The Day the Stars Went Dark

The pen was a cheap one.

That was the joke of it, the part Terrick Amaro had never explained to anybody. Ines bought it in a station concourse forty-one years ago because his good pen had rolled under a bench and the shuttle was boarding. Brushed steel body. A retractor spring with an audible action, the kind that costs nothing and lasts forever.

She put it in his breast pocket and said, there. Now you're a serious man.

He had signed eleven treaties with it. Two censures. One apology to the Loriad Combine that took nine drafts and most of a winter. The papers on his mother's estate.

He clicked it when he was thinking. He knew he clicked it. Three separate chiefs of protocol across a hundred and thirty years had told him, kindly, that it read as impatience from the far side of a table, and he had tried lozenges and worry beads and sitting on his hands. None of it took. So he had settled on being embarrassed about it instead, which was cheaper, and he had kept the pen.

He was a hundred and ninety-one. Bad left knee, from a fall on the Senate steps in a year nobody else remembered. A habit of falling asleep in chairs with his mouth open. A face that people trusted before he opened it, which he had always considered his only real professional asset, because he had never once won an argument by being the cleverest man in the room.

He won them by being the last one still listening at hour six.

That was the whole trade. At hour six everyone has run out of position and wants, more than they want to win, for somebody to hand them a way out that lets them keep their dignity. Terrick Amaro made those. That was his craft. Everything else was vocabulary.

On the flight out he had read the accession treaties. All twelve of them — every galaxy the Dominion of Kael had brought under its schedule — in the original where he could manage it and in translation where he could not. Nine thousand four hundred and six pages. Three days and part of a fourth, cabin lights down, blanket over his knees like an old man, which he was.

And they were boring.

He could not properly describe the relief. He had gone in braced for the ugly appendices where a conquest keeps its teeth — hostage protocols, atrocity indemnities, the paragraph about relocations that always hides behind a word like resettlement — and he found tariff schedules. Customs harmonisation. A forty-year phase-in on currency, which was slower than the Concord had given its own outer provinces. Language protections that were, in two cases, more generous than Aetherian law.

There was a clause in the Sethric accession, Article 40, subsection 9, guaranteeing continued state funding for a regional opera company. He had laughed out loud at three in the morning and startled the steward.

Twelve galaxies had signed. Nobody signs twelve times for a bad deal.

The Ferreiro boy had said something like that at the reception, loudly, with a glass in each hand, and then he had said that Senator-Envoy Amaro could talk a storm into apologising, and Terrick had let himself be flattered for a full four seconds before deciding the young were occasionally correct by accident.

It was about tariffs. It was going to be about tariffs. It was always about tariffs.

He rehearsed the opening in the transfer corridor of Corvane Relay, walking slowly, mouthing it, one hand on the cold rail.

The station was a dead thing they had agreed to meet inside. Decommissioned survey platform at the Vesh trojan point, sealed eleven years, brought up to thirty-one percent on its own reserve bus for the occasion. Air on the recycler's lowest setting, so it smelled of dust and old sealant and that sour sweetness a hull develops when nothing has breathed in it. His breath showed.

Somebody had run a forty-kilowatt portable heater to the conference deck and nowhere else, ducting taped flat along the deck plate in a long silver seam. So the corridor was four degrees and the room would be nineteen and he would be sweating inside twenty minutes. That was normal. He had negotiated in worse. He had negotiated in a tent.

Behind him, through the hull, the station made a sound.

A long structural complaint, low, transmitted up through the deck into his bad knee. The Kaelic courier had docked eleven minutes ago on the number-two collar. Corvane's collars were rated at nine thousand tonnes with the station under thrust and about fourteen thousand static, and whatever they had put on that collar was heavier than that, because the ring was still settling and talking about it.

Bad clamp discipline, he thought. Or a very confident engineer.

He filed it under military, the way you file a general's medals, and let it go.

"The Concord came here with nothing to defend," he murmured, "and everything to offer."

No. Too soft. That was surrender inside eight words.

"The Concord did not come here to defend anything. We came to be useful." Better. Ugly rhythm on useful. He clicked the pen twice, put it away, and took it out again.

Delle Varin walked a half-step behind his left shoulder and had been silent for nine minutes, which, for Delle Varin, was a scream.

Twenty-six. First mission. She had rewritten the briefing folio four times on the flight and then printed it, physically printed it, on actual stock, because she had read somewhere that Kaelic officials distrusted displays. She had cut her hair before departure into something severe that did not suit her. She had said sir eleven times at the dock.

"Delle."

"Sir."

"How many hours did you sleep?"

A pause with arithmetic in it. "Six."

"How many actually."

"Two. And a bit."

"Good. That's about right for the first one." He stopped walking, because his knee wanted him to and because she needed him to. "You'll do the second on four, and by the fifth you'll sleep like a dropped tool and be ashamed of yourself. Now. You have one job today. Ready for it?"

"Yes, sir."

"Hand me the foundry annexe when I say allocation. And write down every single thing he says. Including the things that sound like nothing."

"Sir?"

"Especially those." He gave her the smile. He had a good one and he knew it and he deployed it without guilt, the way a physician uses a warm hand. "Any fool can hear the important parts. Anybody can transcribe a threat. Write down the nothing, Delle. The nothing is where the man lives."

Her shoulders came down about a centimetre.

"And if I click the pen, ignore it. It means nothing. My wife will tell you it means I'm thinking." He put it back in his pocket. "My wife is being generous."

He thought about Aria in the last thirty seconds before the doors.

A hundred and thirty years. They had met when Terrick was a second-tier trade clerk with a stain on his cuff, and Aria Zadkiel was forty-four and already frightening — the boy from the ministry who had corrected an admiral's power-budget arithmetic in front of eleven people and been right, and who had then apologised, badly, for the interruption rather than the correction.

Four governments. Two funerals. One very bad decade in the middle that neither of them ever named.

Aria had stood up at his wedding and given a speech that was, technically, a specification. He had described Ines in tolerances. He had used the phrase within acceptable margin about her temper and the room had come apart, and Ines still had the whole thing written out in a drawer under the good tablecloth.

Aria said nothing at the Senate session. Not one word in two hours and forty minutes. Hands flat on the desk, still, while Halric explained what unified governance meant and did not soften it and did not need to.

Aria said nothing when Terrick volunteered, either. Did not argue. Did not agree. Looked at a point somewhere past Terrick's ear and nodded once, slowly, the way a man nods at a load figure he has already checked twice and does not like.

And at the departure gate he had not met Terrick's eye. He had gripped his hand and held it about two seconds longer than a man holds a hand. His fingers were cold. His fingers had always been cold; Ines used to make him wear gloves at their own table, like a child.

Grief for the office, Terrick had decided, somewhere past the second jump. A High Councilor watching an institution he had served a hundred and fifty years get itemised on a stranger's ledger. Of course he went quiet. Aria went quiet the way other men shouted.

He had turned the page to Article 40, subsection 9, and smiled about the opera company.

He had also meant to send him the lemons. That was the other thing sitting unfinished. There was a tree in the side court at home, a stubborn ancient article that threw about forty fruit a year, and Aria liked them preserved in salt — absurdly, for a man who otherwise ate like an accountant balancing to the gram. Terrick had picked them the morning before departure. Two dozen, in a wooden bowl on the kitchen counter, waiting on the jars.

He would do it when he got back. It was a four-day trip.

The room was long, and nineteen degrees, and there was one table.

Vorn Halric stood when he entered, which was correct, and bowed to the depth appropriate to a senator-envoy of a sovereign polity, which was also correct, and waited until Terrick was seated before he sat. Grey uniform, no ornament, no rank flash. Six officers along the wall behind him, standing, none of them shifting weight.

Four recording drones at the corners. The protocol had specified two. They were Kaelic, matte black, fist-sized, hanging on ducted fans at a pitch just under comfortable, and the sound of them settled into the back of Terrick's skull and stayed there.

At Halric's hip, in a plain sheath, a short blade. Every officer wore one. The briefing said ceremonial.

"Emissary. Thank you for coming out to a cold station." Terrick lowered himself into the chair and let the knee be old in front of the man, because a small honest weakness at the start buys you a great deal later. "The Concord did not come here to defend anything. We came to be useful."

"That is noted," Halric said. Then: "I asked for you by name, Senator-Envoy. I was told you were the best of them."

"You were told by someone kind."

"I was told by someone accurate." Halric folded his hands. "Please begin."

And they began, and Terrick was good.

He knew he was good. He permitted himself to know it for about four seconds, and then he put it away and worked.

He opened with foundry allocation, because you open with a thing you can actually hand across. The Aurelion orbital foundries ran at sixty-one percent of rated capacity and had for four decades, because there had never been demand to push them — civic hulls, tether cable, replacement cars for the eastern elevator. Four decades of idle industrial throughput hanging in the sky doing nothing.

He offered thirty percent of the total on a rolling ten-year allocation. Dominion priority. Concord-operated, Concord-crewed, with a joint inspectorate and a review at year eight.

"That is noted," Halric said.

Delle put the annexe into his hand at allocation without being looked at. Good girl.

He went to licensing, and he did not pretend it was small. Morphic nanolattice — programmable structural matter, the one thing the Reach did better than anyone in eleven known galaxies. Stewardship license. Kaelic manufacture permitted at any scale, Concord patent held in trust, royalties waived twenty years on non-military application and four percent thereafter.

He talked reflow cycles for six minutes. Hull tolerance under repeated phase change: eleven hundred cycles before lattice memory degraded past spec, more if you kept the frame under four hundred Kelvin, and the whole art of it was in the cooling, not the forming. He had made himself learn it on the flight, badly, out of a primer written for schoolchildren.

He knew he was getting the terminology slightly wrong. That was the point. A man who has bothered to learn your language badly is showing you something that a fluent man cannot.

"That is noted."

He offered a Kaelic customs office in Halcyon. Not a consulate — an office, full standing, with inspection authority at the eastern tether terminus, which handled sixty-one percent of the capital's orbital freight and was the only tower rated for heavy mass at speed.

He expected refusal. He expected a counter at something smaller, and he had three fallbacks written and a fourth he had not written down.

"That is noted."

Joint survey rights on the Vesh trojan cluster and the outer sixteen. Concord charts at cost — one hundred and forty thousand catalogued bodies, ninety-one years of continuous survey, the best charts anyone had anywhere.

He put the numbers on it out loud. Numbers are courtesy.

"That is noted."

And then he did the real work, which was never in the annexes.

"Emissary, may I say the difficult thing." He set his hands on the folio. "Our Senate cannot vote for the phrase unified governance. Not because of what it means. Because of how it sounds in Old Aetherian, where it carries a legal flavour of receivership. Give me a different word for the same structure and I will bring you the votes."

He let that sit.

"Concordat of Association. Identical schedule. Identical tariff. Identical defense responsibility. Your ministries lose nothing but four syllables, and I get to stand in a chamber and tell eleven hundred frightened people that they chose it." He spread his fingers. "Nobody has ever been conquered by a word. But a great many people have signed one."

It was, he thought, the best thing he had said in nine years.

"That is noted," said Halric.

Terrick shifted his knee under the table and clicked the pen once, and heard it, and was embarrassed, and kept going.

Because he had felt it, somewhere around the customs office. Down in the place that had sat at tables for a hundred and thirty years.

A man who is buying, counters.

It is not optional and it is not culture. He had done this across nine species and four centuries of accumulated practice and it had never once failed. A man who wants a thing will tell you it is worth less than you said. He will fight the review at year eight. He will call four percent extortionate and then, forty minutes later, discover it is generous if you rename it a licensing surcharge, and he will be pleased with himself, and that small ugly pleasure is the entire machinery of peace.

Halric had not moved one figure. Had not asked one question. Had not written anything down, and neither had any of the six along the wall.

His attention was perfect and warm and completely inert.

Delle's folio was open on her forearm at Terrick's left, and he could see her page without turning his head, and she had done exactly what he told her to do. She had written down the nothing. Eleven lines of it, ruled down the sheet in her careful hand, the same three words, the same three words, the same three words.

Eleven.

He had been counting without deciding to, the way you count stairs.

He is not buying, Terrick thought. He was never once buying.

Then the fan note changed.

The drone at the near left corner pitched up half a tone as it took load, and traversed. Two metres of lateral travel, about a metre of descent, unhurried, gimbal correcting once at the end.

It settled.

It was not framing Halric. It was framing Terrick Amaro, low, from below the tabletop line, and it had taken in the edge of the table and two clear metres of bare deck plate on his side of it.

Oh, he thought.

He understood it entire and at once, and nothing in him argued. There was no surely not. He had read nine thousand four hundred and six pages of a man's habits and found them boring and survivable, and he had been reading the wrong document. The treaties were what Kael wrote afterward. For the ones who stopped.

He had about two seconds to decide what to do with the rest of his life.

Delle Varin was standing behind his left shoulder with her hand on the annexe.

The drone was recording.

So he finished his sentence.

"—and the review at year eight can be brought forward to year five, if the Overlord's ministries would find that more comfortable," he said, in exactly the voice he had used for the last forty minutes, warm and slightly tired, "though I'd want notice in the second quarter, because our foundry crews take their holidays in the third and I have never once won that fight."

He set the pen down on the folio. He did not click it.

"Emissary. Before we continue, I'd like the record to show one correction."

Halric watched him with real attention. Something adjacent to appetite.

"You have called our thousand and six years an achievement. Three times now. I let it pass out of manners, and I find I don't want to let it pass a fourth, because the word is doing work for you and I think you know it."

"Go on."

"It was not an achievement. An achievement is a thing you finish and then hang on a wall and stand near." Terrick's hands were flat on the table. "It was work. It was done every morning by harbour inspectors and third-tier tariff clerks in rooms colder and smaller than this one, and not one of their names is written anywhere, and not one of them ever got to say it was done — because it was never done. Not for a single day in a thousand and six years. It had to be done again the next morning, and it was, by somebody, every time.

"That is what it cost. And it is the only reason your ships arrived here to find anything worth—"

Halric stood.

The blade went in under his collarbone, angled down, and stopped.

Cold first. Then pressure. His hands flattened on the table without asking him. The pen went across the folio, and across the table, and off the edge, and hit the deck.

Halric withdrew the blade and turned to the drone.

"Log the time," he said, at the same volume he had used all afternoon. "The Aetherian Concord has answered. The answer was complete, it was skilful, and it was not an input. The schedule was fixed before I stood in your Senate, and no sentence spoken at this table appears anywhere in it.

"You were not being consulted. You were being notified. The Overlord holds that a polity of a thousand and six years is owed the notification in person."

Terrick was on the floor. He did not remember the interval.

His cheek was on the deck plate, and it was very cold, and it was not unpleasant. Something warm was going into his shirt at a steady rate and not stopping.

Above him, a great deal of noise. Boots. The fan note of a second drone descending.

Delle Varin was screaming. Each one went up at the end, like a question she wanted answered.

Stop, he thought, with more urgency than he had felt about anything in the last minute. Stop it, child. They'll remember that you did it. It will go worse for you. His mouth moved. It was not saying that.

He was not thinking about the Reach.

He was thinking that he had told Ines he would call at the eleventh hour and that she would sit up for it in the chair by the window with the bad lamp, and be annoyed with him, and not go to bed.

He was thinking there was fish for dinner tonight and that he had been planning to be annoyed about the fish.

He was thinking about Aria's cold hand at the gate, two seconds too long, and how plain it was now. How completely, stupidly plain. A man does not hold on like that over an office. He holds on like that when he already knows the answer and has decided not to say it, and Terrick had stood there and let him, and got on the shuttle, and read about an opera company.

His breath was making a small warm patch on the deck plate. The patch was getting smaller.

Somebody should do the lemons before they—

The bet was four credits and a week of Cass's laundry rotation, and Leon lost it on a fish.

"Nine-day cycle," Leon said. "Grey mullet on the third, the sixth, the ninth. Poached, because the second oven in that kitchen has been down since spring and nobody has filed the requisition. Today is the sixth."

"Today is chowder."

"Today is not chowder."

Cass Ferreiro leaned back until the bench creaked and lifted his tray like an exhibit. Chowder. A grey slick of it with three cubes of something structural drifting near the rim.

"They changed the cycle two weeks ago," Cass said. "Because Yems complained about the mullet. Because Yems complains. Your model was beautiful, Zadkiel. Genuinely. Framed-on-a-wall beautiful. The universe just doesn't subscribe."

"That's four credits."

"That's four credits and the laundry, and I want it folded. Not stacked. There's a difference and your house has people who know it."

"My house has one housekeeper. She's sixty and she doesn't like you."

"She looked at me once." Cass squared the deck against the tabletop and thumb-riffled it badly, the way he always did, spilling a corner of a rook. "Looking is not disliking. Looking is a beginning."

The commons held maybe two hundred at that hour — most of third and fourth year, plus the first-years who hadn't yet worked out that the west atrium had better light and fewer instructors. The tall windows ran the whole eastern face. Halcyon went down under them in white terraces to the water, and the eastern tether stood up out of the evening haze like a scratch somebody had made in the sky and never buffed out. Vesh was up already, pale gold, a fingernail. Somebody's music feed was too loud in the corner and three people were arguing about it with no intention of resolving anything.

Cass dealt. Leon watched the cards land and knew all of them, because he always knew all of them, the way other men hum.

"You're doing the face."

"I don't have a face."

"You have the flat one. That's the face of a man who has counted my deck and is being gracious."

"Nine of towers. Left sleeve."

"Slander." Cass produced the nine of towers from his left sleeve and laid it down with enormous dignity. "That is the last time you're invited to anything social."

"Deal."

"My mother sent another clipping." Easily, dealing. "Civic gazette. Your sister at the water gardens thing. The tulip thing. She circled her in red pen and wrote SHE LOOKS PALE, LEON'S FRIEND SHOULD SAY SOMETHING. In capitals. To me. As though I have standing."

"You have no standing."

"I have tremendous standing. I'm charming and I hold a hangar pass." He set a card down. "Is she well? Actually."

"Four good days this week," Leon said. "Sarrow says best since spring."

"Four's good."

"Four's good."

"Tell her my mother says she looks pale."

"I'll lead with it."

That was the last forty seconds.

The music stopped first. Not the argument about the music — the music itself, mid-bar. The argument ran on another half second into a room that had already gone quiet underneath it, and that was how everybody knew.

Then the cards went out.

The tabletop was a display surface, like every surface in the building, and the rooks and the towers and the nine from Cass's sleeve all dropped away together and were replaced by a long grey room with a long table in it. The same room came up on the civic panel above the servery. On the window glass. On the notice boards. On the floor.

"What channel is this?"

Nobody answered. It was every channel. Every channel in the Aetherian Reach and every surface capable of showing anything at all, and it had opened with no title card, no Concord seal, none of the two-note chime that preceded a civic announcement. There is no reflex for that. There had not needed to be one in a thousand and six years.

The audio was room-mic raw. A chair scraping. The hum of a station running at half power. A cough from off-frame.

Terrick Amaro sat on the left side of the table with his hands folded and his jacket unbuttoned, because he always unbuttoned his jacket when he wanted a room to loosen, and he looked like a tired man near the end of a long day of doing the thing he was good at.

A first-year by the stairs laughed.

Leon understood it exactly. She thought it was a drama. It had the framing of one — cold, centred, patient — and the Reach made a great many dramas about diplomats and doomed liners and the heroic clarification of terms, and she was seventeen, and she laughed the way you laugh at a scene that is trying too hard.

Terrick said, "—so if I may clarify the clause on internal customs, because I think we're closer than—"

The officer behind him took two steps.

The blade went in under the left shoulder blade. Terrick coughed. His hands came apart and one of them moved his cup an inch.

The blade came out. That sound was different.

He went off the chair sideways. The drone held its frame. His shoe was in the bottom of it, moving. Then it wasn't.

The first-year stopped laughing.

There is a particular silence available to two hundred people who have no category for the thing in front of them, and it is not the silence of shock. Shock has a shape. Shock comes with drawn breath and hands going up to mouths. This came in stages. First the noise stopped. Then everyone looked at everyone else, checking, because the reflex was to find the person who knew what this was and would explain it, and the room's entire architecture of authority looked back wearing the same face.

Then a low sound started underneath, not words. Two hundred people making the small involuntary noise of trying to file something.

Behind Leon, a cadet named Prewitt Aune vomited on the floor between the benches, quietly and thoroughly, and apologised, and did it again.

A boy near the servery kept saying, "It's not real. That's not — it's not real," at conversational volume, to nobody, in the tone of a man reading a departure board.

On the surface, somebody came into frame and sat down in Terrick's chair.

He was old and broad and unhurried and he sat the way a man sits at the end of a working day. He looked at the drone. He waited a moment for a room he could not see.

"My name is Darvhen Kael. The man on the floor was the only honest party at this table. He believed the words were the thing. I have taken him off it so that no one wastes any more of his sincerity."

His voice was pleasant. That was the part Leon kept.

"Your Concord will tell you a negotiation has failed. It has not failed. It concluded. I am giving you this myself, uncut, because you are owed the argument in its finished form and not a summary of it." A pause. "It will be quick. I would ask you not to make it long. Length is only cost."

Cass still had a card in his hand. He was looking at it. It was blank, because the table was showing Corvane Relay.

Leon's mind went cold and then it went to work, and the two happened so close together that afterward he could never find a moment of anything in between.

Corvane Relay. Decommissioned survey station, Vesh trojan point. Vesh's orbital radius three hundred eighty-one thousand kilometres; the trojan sits at the same radius, sixty degrees ahead. Call it three hundred eighty-one thousand from Aurelion. Light lag one point two seconds.

One point two seconds. That was not a recording being released. That was a man talking to them, now, with a delay shorter than a heartbeat.

Which meant the fleet was not at Corvane. A fleet does not sit at the neutral table. A fleet sits where it is useful, and useful is inside the Ring's engagement envelope, and the Ring's engagement envelope was—

He stopped, because a second thing had arrived, and the second thing was four nights old.

The roof.

Eliana with her knees up and her sleeves pulled over her hands, asking whether the stars ever got tired. Him giving her the fusion answer like an idiot. Then looking up, between the Weaver arm and the Academy calibration star, at a point of light that had moved.

Fifteen seconds of arc. Four minutes.

He had the numbers exactly. He always had the numbers exactly. That was the entire problem.

Fifteen arcseconds is seven point two seven times ten to the minus five radians. Over two hundred forty seconds that is an angular rate of three point zero times ten to the minus seven radians per second. He had assumed a range. He had assumed a hundred thousand kilometres, because the brightness felt like a hundred thousand kilometres, and at that range the rate gives a transverse velocity of thirty metres per second.

Thirty metres per second. A walking pace. Nothing out there moves at a walking pace. Which is why he filed it. Artifact. Sensor ghost, lens flare, a chip of hull off a decommissioning, a smear on the calibration star. He had written the word artifact on it and put it in a drawer and gone back to talking about teapots.

One measurement of angular rate has two solutions, and he had taken the comfortable one.

The other: an object very large, very distant, on a near-radial approach. A body coming almost straight down the line of sight shows almost no proper motion. The fifteen arcseconds was not its speed. It was the residual — the cross-component of a course correction, the small sideways part of an enormous velocity that was pointed at his face.

Run it backward. Four days. Ninety-six hours. Three hundred forty-five thousand six hundred seconds. Assume flip-and-burn, because everyone flips and burns. Assume two gravities, because a navy with twelve galaxies of practice does not coast.

Distance equals acceleration times time squared over four. Nineteen point six, times one point one nine times ten to the eleven, over four.

Five point eight five times ten to the eleven metres.

Five hundred and eighty-five million kilometres.

Put that range back through the angular rate. Seven point two seven times ten to the minus five, times five point eight five times ten to the eleven. Transverse displacement of forty-two thousand five hundred kilometres. In two hundred forty seconds.

A hundred and seventy-seven kilometres per second, sideways.

Nothing in the Reach did that. Not a freighter, not a survey drone, not a chip of hull, not anything with a Concord transponder bolted to it. And it had been visible. Naked eye. A thing visible to the naked eye at five hundred and eighty-five million kilometres is not one hull. It is a great many hulls with their drives lit, burning together, a smear small enough to look like a star and bright enough to be one.

Eleven seconds, start to finish. That was how long it took him, sitting on a bench with a blank card in front of him and Prewitt Aune being sick behind him.

He had had it on Day Zero. One data point, a clear sky, and one more measurement the next night would have given him parallax. Parallax gives range. Range gives the vector, the mass, the arrival window. Four days of it. Four days is an evacuation. Four days is the Ring on alert and the tether platforms cleared and his sister somewhere that was not here.

He had not looked at the sky again.

Leon did not move. He did not make a sound. The room had found its volume and was using all of it — somebody shouting for a proctor, somebody shouting at the ceiling, two people stabbing at Halo Links and getting the soft chime that means the civic net is saturated. He sat straight with both hands flat on the table, which was his father's posture, and he was sick without any part of him moving.

I saw it. I named it. The name I gave it was artifact.

"Leon." Cass's hand closed on his arm. "Leon. Hey."

Instructor-Captain Doren Vasca came in from the north stair and did not shout.

That was the thing. He had a voice that could take the roof off a lecture theatre and every person in that room had been under it at least once, and he came in and stood on the second step and waited, and the commons quieted for him faster than it would have for any amount of noise.

"Panels off."

Somebody killed the surfaces. Corvane Relay went away and the tabletop went back to being a table with nothing on it.

"As of nine minutes ago the Academy is on the Directorate auxiliary roster. That means all fourth-years, all third-years with a frame certification, and any second-year with logged hours in a VESPER. Everyone else goes to the shelter tiers and helps the proctors count heads, and that is not a small job, so do not make a face at me about it."

Nobody made a face.

"I'm going to tell you what you're getting into, because in twenty minutes somebody is going to hand you a machine and I don't want you confused about what it is." He put his hands behind his back. "An AEGIS is a pressure-rated frame. Crane rating ninety tonnes. Hard-vacuum endurance eleven hours, nine if you run the sinks hot. Coolant loop is single-circuit and it will tell you when it's unhappy, and you should listen the first time. It is a superb machine. There is nothing in this galaxy I would rather have under me if a tether gantry starts to come down on a crowd."

He let that sit.

"It carries one beam carbine. Forty-one kilowatts. Ninety-second recharge on the capacitor bank. Cycle limit of twelve before the sink saturates and you are holding a warm stick. It was specified in 'seventy-one for clearing rock out of the shipping approaches. That is what it is for. That is what it has ever been for."

"Sir—"

"I'm not finished." Not loud. "Your Halo Link is governed. The governor sits at roughly eighty milliseconds and no pilot can switch it off in the field, and I don't want to hear from anybody today about a paper they read. Eighty milliseconds is nothing when you're setting down a cargo spine. Eighty milliseconds against a man who has none is a different piece of arithmetic and I'm not going to lie to you about which side of it you're standing on."

The quiet in the room had changed quality. It was listening now.

"So the honest job today is not fighting. The honest job is lift. Eastern, western, northern and southern tether stations hold between six and nine thousand civilians each at this hour, and eastern is the worst of them because the evening cycle stacks the platforms four deep. You will go. You will take load. You will bring people down and go back up and do it again. Four hours of that and you'll have done more good than anything you were picturing twenty minutes ago."

He straightened.

"The Ring will hold."

He said it without a number.

Everything else had carried one. Ninety tonnes. Eleven hours. Forty-one kilowatts, ninety seconds, twelve cycles. Eighty milliseconds. Six to nine thousand. The man had built the entire speech out of figures because figures were how he told the truth, and then he came to the sentence that mattered and there was nothing inside it.

Leon looked at him. Vasca, briefly, looked back.

"Kit up," Vasca said, too fast. "Frame assignments on your links. Go."

The corridor to the north hangar was a river of people, and Cass went into it talking.

"Fine. This is fine. This is fine, I've got —" checking his link, walking backward, taking a doorframe with his shoulder "— AEGIS eleven. Eleven. The one with the lazy left shoulder actuator that overshoots four degrees on a fast reach. Classic. That's the Ferreiro luck. Four credits richer and the frame with the shoulder."

"Cass—"

"Eastern station. Eastern's good, eastern's got the wide platforms, you can set a whole gantry down on the wide platforms." He turned around and kept walking. "Six thousand, he said. Nine at the stack. How many lifts is that? You're the one who does the — how many?"

"Ninety-tonne rating," Leon said, and heard his own voice come out flat and correct. "Four hundred kilos a person with kit and margin. Two hundred a lift if you're reckless. A hundred and twenty if you're not."

"So?"

"Forty-five to seventy-five lifts."

"Forty-five to seventy-five." Cass repeated it like a good hand had just come off the deck. "That's a whole day. That is a whole honest day of work, and then I'm going to eat everything in that dining hall including the chowder, and you're going to sit there and watch me do it, and you're going to pay, because you owe me four credits."

His hands were shaking. He wasn't hiding it and he wasn't apologising for it.

At the hangar doors he turned and got Leon's collar in both fists and pulled him in, and his face was six inches away and terrified and grinning.

"Folded," Cass said. "Not stacked. There's a difference."

Then he let go and went through the doors with four hundred other people, and Leon lost him in the crowd in under two seconds, which is the ordinary amount of time it takes to lose someone in a crowd.

His Halo Link pinged a private channel and the channel carried his father's key.

The corridor noise dropped as the connection took the local layer down. His father's voice came in with no preamble, quiet and level. Leon had heard that voice deliver a technical brief to the High Council. It had sounded exactly like this.

"Get your sister. Get to the house. Do not go to the hangars. Do not argue."

"Father, the Academy's on the auxiliary roster, I'm rostered, there are nine thousand people stacked on the eastern platforms and every one of those lifts is—"

"Leon."

"—and I'm the best pilot in my year and Vasca knows it. He'll clear me. I can be at eastern station in eleven minutes."

"Leon Asher Maximilian Zadkiel."

Leon stopped walking. People went around him.

Four times in twenty-four years. He could name all four. The fourth had been eleven years ago in a hospital corridor.

"Yes, sir."

"The house," Aria said. "Not the hangars. Your sister first. Before you pack anything. Before you find anyone." A pause, and inside it, faint and far down, a fabricator running. "Tell her the day was boring."

"It isn't."

"Tell her anyway." Another pause. "And Leon. Carry her down. Don't let her take the stairs."

The channel cut.

Outside, the sky over Halcyon changed.

There was no fire. Leon had expected fire and there was none of it, not at the start. He came out onto the east terrace with the crowd and the light was the ordinary long gold of a Halcyon evening, white stone gone warm, Vesh a fingernail, Ilma not yet up, the water gardens throwing their small moving glints against the underside of the civic rings.

Then there was a new star.

That was all. A point of white above the eastern horizon where there had been no point of white. Steady for a second and a half. Gone.

Then two more. Then a scatter of them, six or seven together, in a rough arc that followed the line of the Ring across the sky. Each one small and clean and silent. They did not look like violence. They looked like somebody switching on lamps in a house across a valley.

A woman on the terrace said, "Oh, how pretty," and put her hand over her mouth.

They came faster. By the third minute there were too many to count and Leon stopped counting, and the arc had thickened into a broken chain from the eastern horizon up past the zenith, and some of them were no longer going out. Some stayed, and dimmed, and went orange, and began to spread.

Sound arrived at minute five. Not a bang. A long arriving pressure, felt in the sternum and in the window glass, the sound of very large things happening a very long way up.

At minute seven the first debris came in.

That was when it stopped looking like lamps. A section of interdiction spine — four hundred metres of it, though from the terrace it was a fleck — entered on a shallow line and lit and drew a white scar the whole width of the sky. It took a long time to cross. It broke into eleven pieces on the way and each of the eleven grew its own tail.

Then another. Then the eastern quarter of the sky filled with them. Dozens. A slow bright silent rain going the wrong way, too orderly, all of it travelling in the same direction along the same great arc.

The crowd on the terrace made no sound at all.

At minute nine the eastern tether flexed. Ninety kilometres of it stood visible from here and it moved like a thread — one slow lateral wave passing up it out of the haze into the light — and there was nothing in the world with enough hand to do that.

At minute eleven a fragment about the size of the civic assembly hall came down over the harbour and did not burn up, and the four grey Kaelic escorts that had hung there without moving for four days moved. Sideways. Unhurried. Out of its way.

The light on the terrace went from gold to a bad copper.

Leon looked at it for one more second. Sixty-one steps. Nine and a half minutes on that staircase, and the service lift ran two seconds long on the return. The estate road was four point one kilometres from the east gate and he had run it in nineteen minutes once, on a bet, in shoes.

Carry her down.

He turned and ran.

Bay Fourteen smelled the way it always smelled: coolant, which was cut grass, and hot copper, which was the busbars. Cass pulled it into his lungs and held it, because everything after it was on a different schedule.

"Ferreiro, Cassian, cadet, second year," he told the bay clerk. She was nineteen and had both palms flat on her console to keep them still. "Frame Aegis three-one-four. Mass of pilot, eighty-eight kilos. Mass of pilot's debts, restricted."

She laughed. It came out crooked, but it came out.

One, he thought. Nine to go.

The harness took him in five points and pulled. Chest, hips, thighs, then the shoulder yokes coming down with the hydraulic sigh that always sounded to Cass like an old man lowering himself into a chair. He found his seat bones. He let the gel bladders learn his spine, which took forty seconds and could not be hurried, and he spent the forty seconds looking at the ceiling of Bay Fourteen, which had a water stain shaped like a duck. Second-years called it the duck. It had been there since before his mother was born.

Then the Halo Link seated behind his right ear.

Cold thing. Everybody said cold and everybody undersold it, because you were supposed to be casual, and Cass had been casual about it for two years and it still went in like a coin dropped down the back of a collar. A hard chill. A click at the mastoid. Then the world got wider — his proprioception unspooling out of eighty-eight kilos and into forty-one point two tonnes of morphic nanolattice, until the frame's ankles were his ankles and its hands were where hands go.

Then the governor came up behind it, warm, polite, unhurried, like a hand laid on your wrist at a party.

Interface latency nominal. Eighty-one milliseconds.

Eighty-one. Same as yesterday, same as every day he had ever measured, and Cass measured everything with odds attached. Eighty-one milliseconds was the house edge. You did not argue with the house edge. You played anyway and you tipped the dealer.

"Flight Rho, comm check, count off." Loose voice. Not cheerful — cheerful would have been an insult tonight. "Rho lead is up and beautiful."

"Rho two, up." Denna Fol, level as a bench.

"Rho three, up." Marik Oyelaran, half an octave high.

"Rho four." Pia Sennet, and then nothing.

"Rho four, you left off the part where you tell me you're up."

"...Up. Sorry. Up."

"Rho five, up, and my hands are wet." Toby Karr, who had never once in his life declined to say the embarrassing thing out loud.

"Everyone's hands are wet, Toby. It's in the design brief. Wet hands mean the pilot is paying attention. It's the dry ones you want to keep an eye on." Cass ran his palm down the checklist plate and let the frame answer him one system at a time. "Reactor, green. Lattice reserve six point four tonnes, unallocated, all of it mine to spend. Thermal loop green and cold, which is my favourite temperature. Coolant pressure four hundred and ten kPa. Radiator fins stowed. Carbine—"

He looked at the readout for the low-yield beam carbine racked on the right hip. Rated for asteroid clearance. Rated to cut a two-metre rock into pieces small enough for a tug to swallow.

"—carbine green, ninety-four percent charge, which is plenty, since we're not shooting anything. Rescue lamp."

He thumbed it. Two thousand lumens flooded the bay, and the clerk flinched, and eighteen metres of white and gold machine lit up like the inside of a chapel.

"Lamp is green. Lamp is the job."

Off the group channel, private, Denna said: "Cass. Are we going to be all right."

He looked at the duck.

Three hundred kilometres straight up, the Ring was coming apart. He had been listening to it for four minutes on the Directorate band. Nobody was screaming. That was the piece he kept snagging on. It was all procedure voices, clipped and correct, reading bearings and range gates and closure rates, very calm, very trained — and then one by one not reading them any more, no cutoff sound, no last word, just a bearing that never got its number.

He put himself back on the group channel so all four of them got the answer.

"We are going to a tether station. We are going to pick people up and put them down somewhere lower. That's the whole job description." He let his voice grin. "We're beautiful ambulances. Somebody told me that once. Very pleased with himself, this guy. Top of the class. Dances like a stepladder."

"Where is Zadkiel," Marik said.

"Home. Sitting on a roof with his sister, explaining fusion to her when she asked for a poem."

He said it to be warm and heard it land wrong in his own chest, because home meant Halcyon, and Halcyon had four grey ships standing over the harbour, no running lights, no windows, four days motionless.

In the left chest pocket of his flight suit, folded into eighths, was a clipping his mother had sent. She sent one a month. This one came out of a civic feature about the water gardens: a small girl in a white cardigan bending over a carp pond, and in the margin, in handwriting like spilled wire, the Zadkiel girl again, ask your friend if she is well, love you, eat something.

He kept meaning to ask.

"Rho flight, launch order, thirty seconds." Instructor-Captain Vasca, whose voice had not moved one degree in the two years Cass had known it, and which was, that hour, the most reassuring object in the Reach. "Eastern tether, mid-station, ground-side ascent queue. Nine thousand two hundred civilians on the platform. Car drive is stalled at the counterweight. Halcyon Civil has nobody closer. You will lift. You will not engage. Repeat it back to me."

"We will lift, we will not engage," Cass said, and meant every syllable of it.

The catapult took them.

The eastern tether came up out of the evening like the thread the world had been strung on.

He had flown past it a hundred times and it did it to him every time. Eighty centimetres of ribbon, thirty-six thousand kilometres long, standing straight up out of the east district into a sky still gold at the bottom and already black at the top. Vesh sat fat and pale over the sea. Ilma was a small hard blue coin near the water.

Mid-station at four kilometres: a white ring of platforms and gantries clamped around the ribbon like a fist around a rope.

The platform lights were on. That was the part that got under his ribs. Queue markers, kiosk signage, the little amber strips along the edge that told you where the edge was — all of it burning, ordinary, because nobody had thought to tell the lights.

Nine thousand two hundred people. Standing in a queue. Still more or less in the queue.

"Rho flight, formation open, lamps up," Cass said. "Hands out and slow. Denna, north gantry. Marik, south. Toby, Pia, you're cargo with me — we fill cars, we drop cars. And everybody talk to them before you touch them. They've never seen one of us this close and we are extremely large."

He came down onto the north platform with the lamp lit and both hands open and put the frame on one knee, because a kneeling machine is a smaller machine.

"Good evening," he said on the external, and let his voice do the thing it did across a card table. "My name is Cadet Ferreiro. This is a Concord rescue frame. I'm about to give all of you an extremely undignified ride."

Somebody laughed. In nine thousand people, one laugh carries a long way.

Then they worked, and the AEGIS-class was built for exactly this, and it was superb.

Cass opened his budget on the left forearm and told it to reflow. The arm came apart into its programmable state — matte grey, seething faintly, running like warm syrup along the vector he'd drawn — and set. Four hundred kilos of lattice pulled out of his forearm and re-laid as a ramp. Ninety centimetres wide. Textured tread. A lip at the edge, because people trip.

Cost: four hundred kilos off six thousand four hundred. Loop temperature up eleven degrees. Fifty-one seconds to set hard.

"Ramp's cold. Go. Walk, don't run, there is room for every single one of you."

They came up into his right palm. Sixty at a time, which was a rounding error against nine thousand two hundred, and he carried them across the gap to the loading car and set them down and went back and did it again.

The south gantry began to fail on the fourth trip.

He heard it before Marik called it. The structural mics caught a long tearing groan, the specific noise of a truss shedding load onto a member nobody had ever asked to carry it. Eight hundred people were standing on that span. The support column had cracked at the second joint and the whole thing was leaning four degrees and taking on more.

"Rho lead, I can't hold it, I'm one frame—"

"You're not one frame." Cass was already crossing. "Marik, get under the outboard end and stand. Don't lift. Stand. Be a post. Denna, other end, same. I'm bringing mass."

He dumped the whole forearm allocation, then took nine hundred kilos out of the left pauldron and both thigh plates and ran it out in a slow bright pour, shaping it in air the way they taught in second year and never let you do outside a sim: a column, hollow, one point four metres across, internally ribbed, nine metres long. A ribbed hollow column carries more than a solid one for the same mass. It is the first thing anybody learns about spending lattice and the last thing anybody gets to do with it.

He set it under the cracked joint, locked the collar, let it cure.

Loop temperature plus twenty-six. Coolant pumps to ninety-two percent. Radiator fins out. Reserve: three point one tonnes.

The gantry stopped moving.

Eight hundred people stopped screaming at roughly the same moment, which is also a sound, and is not a good one, and Cass took it anyway.

"North platform, Rho lead. South span is shored and stable. Nobody push. We have all evening." Queue count: six thousand one hundred. Eleven minutes gone. Three hundred a trip, four minutes a trip, five frames — forty-five hundred an hour. We can do this. We can actually do this. "Toby, how's car six?"

"Loaded. Four hundred and ten. Sealing now."

"Drop it. Next."

A woman in his right palm had a cat inside her coat and was apologising to it without pause. A man kept trying to hand Cass money, holding it up over his head as though the frame had a pocket. A boy of about six had climbed onto the base of Cass's thumb and would not be prised off it, and Cass left him there, because the thumb was the structurally safest place on the entire hand.

"Hold the thumb," he told him on the external, very gently. "That's the rule. You hold the thumb, I do all the rest."

For eleven minutes on the north platform of the eastern tether at dusk, Cassian Ferreiro was precisely where he was supposed to be, doing precisely what he had been built and trained and budgeted for, and it was working.

Then something came down the ribbon.

It came down the line at four hundred metres per second and stopped in one hundred and ten metres. No Concord frame could shed velocity like that and keep its pilot. Which meant it had a drive and a spine designed by people who had stopped worrying about that a long time ago.

Cass looked up with his lamp still burning.

His own frame was Aurelion white and Concord gold, red cross on the left breast, two thousand lumens on the chest, a beam carbine on the hip rated for asteroid clearance, and both hands full of civilians. A committee had spent nine months arguing about the colour temperature of that lamp so it would look friendlier to frightened people.

The thing on the ribbon was grey. No lamp. No crest, no unit number, no marking meant for anybody outside itself. Every line on it ran forward. Where the AEGIS carried a rescue locker it carried a magazine; where the AEGIS carried the lamp it carried a muzzle on a barrel long enough to need a counterweight. It had been designed by people who asked one question and then kept working for a great many years until they had the answer.

KARRN-class. Line assault frame. He knew the silhouette from a briefing slide four days old.

Cass did what doctrine said.

"Unidentified frame, this is Concord rescue Aegis three-one-four, eastern tether mid-station. We are a civilian evacuation. I am posturing down." Both arms wide, palms out. He unlatched the carbine from the hip and let it hang on its lanyard. He took the lamp to fifty percent so it would not read as a designator. He put the frame's head down five degrees. Every article of de-escalation via posture, correctly, in three point one seconds. "Repeat, rescue operation, nine thousand civilians on this platform, please acknowl—"

The Karrn shot Marik Oyelaran through the cockpit.

No ranging burst. No warning round. The gun spoke once. Marik's frame opened at the chest, and the top half went off the span and fell four kilometres, and the legs stayed standing under the gantry, holding it up, because he had told them to stand.

It had not answered because it was not a party to a conversation. Cass understood that all at once and entirely, the way you understand a hand of cards has already gone.

"CONTACT. Contact, contact, Rho flight break—"

Four more came down the ribbon.

Here is what eighty-one milliseconds is.

It is the first syllable of a name. It is a twelfth of a second. It is the gap between deciding to blink and blinking. It is nothing at all. Ask anyone.

Cass saw the second Karrn's shoulder mount rotate onto Pia Sennet.

"Pia, left—"

Pia was better than him in the sims. She thought left immediately. Her Link took left. Her governor logged left, and eighty-one milliseconds later her port thruster cluster lit.

The round arrived at sixty-three.

Her frame completed the manoeuvre. Textbook lateral break, clean form, nobody inside to grade it. It flew two hundred metres and hit the station ring and stopped there.

"Pia's gone." Denna, flat. "Cass, she's — what do we—"

"Under the platform. Put steel between you and them. Do not fly straight—"

Toby Karr did the correct thing. He put his frame between a loading car and a Karrn and broadcast surrender-and-shelter on the emergency band, which is doctrine when you are outmatched and carrying civilians, and which had never once failed in a thousand and six years, because in a thousand and six years it had only ever been transmitted to other Aetherians.

The round went through him and into the car.

Cass stopped talking. Not shock. Triage. Talking cost time and time was the only chip left on the table.

So he started leading his own machine.

It arrived the way a run of cards arrives — all at once, out of nothing. If the frame answered eighty-one milliseconds late, then he had to ask eighty-one milliseconds early. Not react. Pre-commit. A Karrn's hip rotates before its shoulder tracks, two hundred milliseconds of tell, every time, mass-produced pilots in mass-produced frames doing the drill they were taught. Call the evade at the hip. Be wrong sometimes. Be alive.

He threw three-one-four into a hard right yaw at a Karrn that had not fired.

It fired. He was already going.

Oh, he thought. Oh, you absolute beauty.

He reflowed six hundred kilos off his back plating and laid it across the left forearm as a slab, mid-fall, while falling, which the manual said was possible and which nobody in his year had done outside a tank. The slab ate a round meant for his reactor and ate it badly — the lattice went to vapour in a cone, the shock came up the frame and through the couch and into him, and something in his left wrist gave with a sound he felt rather than heard — but it ate it.

Reserve: two point five tonnes.

He put a shoulder into a Karrn's knee actuator at forty metres per second and felt eighteen metres of grey machine go over the edge of the world.

He shot another one. Low-yield carbine, rated for asteroid clearance, four hundred and ten milliseconds of continuous burn straight into the cooling intake at the base of the neck, because he had read a briefing slide four days ago and remembered where the intake was, and because he was, it turned out, very good at cards.

The Karrn stopped working and went down on the platform with its arms still in a firing pose.

For ninety seconds, on the north platform of the eastern tether at dusk, Cassian Ferreiro was the second-best pilot in the Aetherian Reach.

He was laughing. He knew he was laughing and could not stop it, and it was not a brave sound; it was a body deciding that laughing was cheaper than the alternative.

There were nine of them now. There had been five.

"Denna, north stair, GO—"

Denna Fol went. Denna Fol got two hundred metres.

Cass did not look. Cass had a car to fill.

Car nine was rated for four hundred and forty.

He put five hundred and six in it. Twenty-two percent over, and he did the drive-spar arithmetic while he loaded, because the spar carried a safety factor of four and he needed one point two two of it, and one point two two is a long way under four.

He carried them in his hands, forty and fifty at a time, hunched so his own back was their roof, rounds coming off his shoulder plating and taking lattice away in strips. Reserve one point four tonnes. Nine hundred kilos. Six hundred. Four hundred. He was running out of himself and spending it in the right order.

Last group up the ramp. He closed them in and hit the release plate with the flat of his hand.

Car nine came off the ring and started down the ribbon toward Halcyon. Four kilometres of descent, brakes already singing, five hundred and six people inside.

And Cass Ferreiro, twenty-five years old, three hundred and eleven credits down to a bookmaker in the east district, whooped.

He did it on the Academy open channel, which every cadet and instructor and frame and ground station in the system was carrying, because that was the channel he had been shouting on all evening and no part of him stopped to think about it.

"CAR NINE IS AWAY! Car nine away, five hundred and six souls, somebody tell Civil to catch it, it's heavy and it's coming in fast—" and he was laughing again, delighted, filthy with it. "Vasca. Vasca, are you listening. I want that in the record. Five hundred and six—"

"Recorded, Ferreiro," Vasca said, from somewhere, and Vasca's voice had moved exactly one degree.

There were still eleven hundred people on the platform.

Cass turned around and went back and knelt and opened his hands.

"Come on. Come on, you're all right, that's it, mind the lip—" A boy climbed onto the base of his thumb. Maybe the same boy. He did not check; he was holding four bearings in his head and he had counted eight Karrn and there were nine.

The ninth came up the outside of the ribbon on a vector he never had time to check. It fired once, from behind and above, at three hundred metres. The round went through the back of the AEGIS's neck, through the couch, through him, and out through the red cross on the chest, and it did not stop there either.

His hand stayed open.

On the Academy open channel, at 19:41:06:

"—hold the thumb, kid, hold the thu—"

The carrier stayed up one point four seconds after that, and then dropped, and the channel was very clean, and forty kilometres away and three hundred metres below, running down a service road toward a transport with his coat open and his sister's name in his mouth, Leon Zadkiel heard all of it.

Car nine went down the ribbon at eleven metres per second, brakes glowing, mass twenty-two percent over rating, spar holding exactly as calculated.

Inside it five hundred and six people stood pressed together in the dark, and a woman apologised to a cat inside her coat, and the floor shook, and no one there ever learned the name of the cadet whose hands they had climbed out of.

They only knew that something white had knelt down, and turned its lamp low so it would not hurt their eyes.

The service lift went down for a long time, and it smelled of glycol and cold iron.

Elizabeth counted. She had counted a great many things in her life — courtiers in a receiving line, exits in a room, the seconds between a child going over on the terrace steps and the child deciding to cry — and she counted now because counting kept her hands still.

Eleven. Nineteen. Thirty-one.

The house had four cellars. The deepest arrived in nine seconds.

At forty-four the car slowed, settled, and opened onto cold.

She stepped out into it and did not stop walking.

The air had weight. It came off the floor and went in at the ankles, and it carried a smell she had been washing out of her husband's cuffs for six years without ever once naming it aloud: coolant, ozone, hot metal cooling down.

Aria stood thirty metres away at a console that threw pale light up under his jaw. His coat was off. His sleeves were rolled to the elbow. In a hundred and thirty-one years she had seen his forearms perhaps forty times.

He turned at the sound of her shoes on the deck plate.

She watched him get ready.

She watched him select a sentence — he had two or three, he had been assembling them since before Eliana was born — and she watched his mouth open around the first word.

"Don't," she said.

He stopped.

She came the rest of the way and stood in front of him and let him read her face, because that was faster than talking and there was no time to be gentle about it.

She saw it arrive. Not shock; Aria did not do shock. He did a small correction behind the eyes, the one he did when a figure came back off his estimate and he had to decide whether the instrument was lying or the world was.

"How long," he said.

"Eleven days ago you came to bed with coolant on your hands. You'd washed twice. It gets into the cuticle." Her voice stayed level. "You lay on your back with your arms at your sides like a man in a diagram."

"Elizabeth."

"Four days ago you straightened Leon's collar." She let it sit. "His collar was straight, ilvenn. It has been straight since he was nineteen."

Aria looked at her, and she watched him understand that neither of those was the answer.

"You've known longer than eleven days."

"Yes."

"How much longer."

"Six years." A fraction of one shoulder. "Perhaps seven. I stopped keeping the date."

The thing that came into his face was not guilt and not relief.

It was gratitude, and she had to set her heels against it.

Because she knew exactly what she had handed him. Six years of climbing up out of a hole at two in the morning, washing to the wrist, and getting into bed beside a woman he believed he was protecting. A secret is only a weight if someone is under it with you. She had let him have somewhere in his life where he was nothing but a husband who slept badly.

There it is, she thought. The whole marriage. In one sentence, and neither of us ever said it.

"You let me," Aria said.

"You needed it."

"I would have told you."

"I know. That's why I never asked."

He put his hand briefly over his mouth. From him that was weeping in the street. Then he took it away and was composed.

"All right," he said.

Then she looked past him.

She had thought she was prepared. She had built a picture over six years out of the noise through the floor and the smell on his hands, and the picture had been roughly the size of a shuttle. A vehicle. A thing a man got into.

The picture was wrong by an amount she had no unit for.

It stood in a shaft of white worklight with its arms at its sides and its head somewhere up past the third gantry in the dark, and she had to tip her chin back to find the crown of it, and her chin kept going. The scaffold rails around it were furred with frost. Coolant lines the thickness of her thigh ran down out of the ceiling and into its shoulders and sweated in the cold.

She knew nothing about lattice. Nothing about coupling, or load, or thrust. She could not have named one component on it, and she understood, standing there, that she was entirely the wrong woman to be looking at this.

That was why it went through her.

Because what she saw was not a weapon.

What she saw was the hours.

Someone had put every one of those plates on. Someone had stood on that gantry at three in the morning, three hundred and forty metres beneath his sleeping children, alone, for years, with cold hands. And then had gone up in a lift that ran two seconds long, and made tea, and asked Eliana how she had slept.

There was a crate near the console with a folded blanket on it. There was a mug beside the blanket with a brown ring dried into the bottom.

There was no chair anywhere in the room.

Against the far wall stood a rack with four cradles in it, and the cradles were empty, and the mounting collars had never been closed.

"What's missing," she said.

"Fin funnels. Four." Aria did not look at the rack. "I had the fabricators. I reassigned them on Day Zero."

"To the other one."

"To the other one."

Her breath showed. The floor took the warmth out through her shoes.

"It's under their rooms," she said.

He said nothing.

"Eliana's bed is on the second floor. Call it three hundred and fifty metres." Nothing in her voice moved at all. "She has been sleeping three hundred and fifty metres above a face."

"Yes."

"Every night."

"Yes."

She nodded, slowly, and found that she was not angry, and examined that, and put it down where she could reach it later.

"It's very cold in here."

"It has to be. The core sinks four hundred kilowatts to standby. If I let the room come up, the lattice creeps."

"I know it has to be." She pulled her sleeves down over her wrists. "I am not asking you to fix it. I am saying that you were down here, in this, and I was upstairs in a warm bed. That is all I am saying."

She had come down with one question. She asked it, because everything else was decoration and there was no time for decoration.

"Can anyone else fly it?"

He did not answer at once, and she loved him for it, because it meant he was assembling the true answer instead of the kind one.

"No."

"Tell me the whole reason. Don't shorten it for me."

So he told her.

He told her the frame did not take commands. It took intention, and the interface was not a control but a coupling, and the coupling ran both directions, and that was the entire point and the entire problem.

He told her the coupling had a percentage. That every nervous system had a ceiling on that percentage. That the ceiling fell with age, steadily, not because the mind slowed but because the tissue stopped being able to tell its own signal from the machine's.

Below the ceiling, the frame read from the pilot.

Above it, the frame wrote to the pilot.

"Writing what," she said.

"Whatever it requires. Motor sequences first. Then threat weighting. Then the layers underneath those." He said it the way he read a pressure gauge. "It does not stop being me all at once. It stops being me in the order the tissue surrenders. Fine control, then retrieval, then the autonomic set."

"What does the machine need."

"Full authority is approximately eighty-five percent."

"And you."

"Sixty-one point four," Aria said.

She did not move.

"Say the rest."

"At the delta I am proposing, between thirty and fifty minutes of useful function. The variance is mostly blood pressure." He paused, exactly long enough to be honest. "There is no disengagement point that helps. The damage is not the kind that reverses."

"You're certain."

"I am fairly confident," said Aria, because he was constitutionally unable to leave an estimate unqualified, and she understood then that he had checked this figure many times, hoping to be wrong, and had stopped hoping some while ago.

The cold plant cycled somewhere above them. A pump ran up, held, and shut off.

She let the whole thing stand in the air. She had been raised in a court where hearing a full sentence without moving was the second thing they taught you, after posture, and she spent all of it now.

Then she said, "When did you last eat?"

Aria blinked. "I'm sorry?"

"You ran the numbers for the machine." Her voice did not rise; it went hard and tender at the same time, which was a thing only she could do. "You did not run them for the man. Half a pear at eleven. Water twice. You have not slept since the Senate. In fifty minutes you intend to hold a four-day-starved body at eighty-five percent of a load it is rated for sixty-one point four of."

"That is—" He stopped. She watched him actually compute it. She watched the correction land in his shoulders. "That is not negligible. That is perhaps eight minutes."

"Eight minutes."

"Possibly nine."

"Then eat, Aria." She did not blink. "Before you go down there and die for me, eat something."

He looked at her, and his eyes were wet, and he did nothing about it.

"Ration case at the foot of the gantry," he said.

"Then that's settled."

She moved.

She put her hands on the console rail, set her spine the way a woman does before a long standing dinner, and began out loud, because out loud was how she found the holes.

"The capsule in the cellar. Two berths, deep transit rated. You never told me it was there. You simply had a wine rack removed in the spring and I let you." She was not looking at him; she was walking the house in her head, floor by floor. "Cold to seal — eleven minutes?"

"Nine, with the vector preloaded."

"Then I preload it. Randomised."

"Randomised."

"Not a destination. Not Astraia, not Meridian, not my mother's coast." She flattened her palm on the rail. "A place is an argument, and a clever man wins arguments. Where would that family run — that's a list of nine, and eight of them are wrong, and the ninth kills them. So it's a number instead. Nobody negotiates with a number."

"Yes," Aria said.

"Medication." One finger. "Sarrow leaves a fortnight in the cabinet and a fortnight in the cold store. Twenty-eight days at full schedule. Forty-one on the reduced schedule she hates. I take both, and I write the reduced schedule out in my own hand, because she will argue with a printed label."

"She will argue with your handwriting."

"She will argue with a headstone." Second finger. "Pip goes. Not sentiment — that drone carries eleven months of her baseline, and no physician anywhere will believe a word out of a girl who says she feels fine."

"Agreed."

"Staff." Third finger. "Marta has a sister in the hill terraces. Forty minutes on the coast road at a walk, and Marta walks, and the road runs away from the towers. Hensh has nobody, so Hensh goes with Marta. He will refuse. I will not ask him twice — I will simply tell him he is escorting her, and he will believe it, because he likes being needed more than he likes being safe."

"And Dunnat."

"Dunnat is eighty-one and slow and would be on that road at dusk." Her mouth thinned. "Dunnat goes down to the pump cellar with water and I shut the cliff door on him myself. He will hate me. I would rather he hated me indoors."

She stopped. Something crossed her face and stayed.

"Nobody goes east," she said.

Aria looked up. "Say that again."

"The eastern road. Nobody uses it, nobody crosses it, nobody goes near the tether foot." She turned to him. "The Legate. At the reception. He had the tether network by heart — he recited it to my daughter like a boy reciting a poem for a sweet. Western and northern cycle at reduced load after the twenty-first hour. Southern isn't tied into the orbital relay, only civic. Only the eastern is rated for delegation mass at speed."

The pumps were quiet now. She could hear the frost ticking on the rails.

"He told her which door to use," Elizabeth said.

"Dusk is in fifty-one minutes."

"Then nobody goes east."

She lifted a fourth finger.

"What burns. The Astraian correspondence, all of it, forty years, my mother's included — there are eleven names in those letters belonging to people who are still alive and still worth taking. The genealogies. The household ledger, because a ledger tells a stranger who works here and which room they sleep in." She looked at him. "And anything with the word Meridian on it."

Aria's hand went still on the rail. "How do you know that word."

"I don't," Elizabeth said. "You're about to tell it to me."

He told her about Day One.

He told it flatly, standing with a ration bar half unwrapped in his fist like a man being sensible for the first time in a fortnight. Unit-02. Ninety-two percent complete. Thirty-one days from operational and eleven days on the clock. That he could not finish it. That he would not leave a nine-tenths-built frame in a hole for someone to lift out and copy.

That he had it crated incomplete on the first night, in six sections, cradled in ballast foam and shipped on a bulk hauler under an agricultural manifest forged well enough to bore a customs officer to death.

Meridian-7. A dead survey world. Thin air, no water, no lane traffic, no strategic value of any kind, which was the entire specification.

That there was a cold vault under the Old Observatory.

That the vault door was voice-keyed.

"To what," she said.

"To your name. Your maiden name. Spoken in Old Astraian."

She stood very still.

"Astraeya," she said.

The old vowels came up out of her the way they came up in bed, in the dark, and they sounded absurd here, in the cold, against all that metal.

"Yes," Aria said.

She waited for the reason. He did not give one. He looked at her and said nothing, and she understood he was not going to, and that if she pressed he would hand her something true and insufficient about phonemic redundancy and Old Astraian having no living speakers outside two families.

So she did not ask.

She added it instead to the long list of things she carried for him without receipts, which she had never once minded.

"Who else can open it."

"Nobody living."

"Then that's three of us, and one of us is dead by dinner." She heard the sentence leave her. She did not take it back. "I'll teach it to Eliana. Not to Leon."

"Why not Leon?"

"Because Leon will say it aloud to prove that he can," said Elizabeth. "And Eliana will not say it at all until it is the only thing left to say."

The list ran out.

She had been dreading the place where it ended, and here it was, and it was smaller than she had expected, and there was nowhere left to put her hands.

She crossed the deck.

She took his face between her palms.

His hands were always cold. Tonight his face was.

"Sevanne," she said.

He closed his eyes.

"Come home."

"I will try."

Neither of them corrected it. She held on for the length of one breath — his jaw under her thumbs, four days of stubble — and then she let go and stepped back and made herself into a woman with a schedule.

She was at the lift with her hand flat on the call plate when she turned.

"One thing. About the children."

Aria waited.

"The package you're sending Leon. The dataset." She had been turning this over for four days, at odd hours, while doing other things, the way she thought about everything that mattered. "The sync curve. Your figure. Sixty-one point four."

"What about it."

"Put it on the first page."

He frowned, very slightly. "It belongs at the back. It's the conclusion. It follows from the—"

"Aria." She did not raise her voice. "He reads until he understands, and then he stops. He has done it since he was six. If you bury your number behind the derivation, he will get exactly as far as understanding what the machine needs, and he will stop there, and he will spend two hundred years believing there was a version of tonight where you came home."

Aria's hand closed slowly on the rail.

"First page," he said.

"First page."

The doors began to shut.

She said nothing else, and neither did he, and through the closing gap she saw him turn away — not slowly, not looking back, already crossing the deck, already reaching for the gantry ladder with the ration bar in his teeth.

Because there was work.

The doors met. The car started up and ran, and near the top it ran two seconds long, the way it always did, and Elizabeth Zadkiel stood in the dark and used both of them to arrange her face.

Then the doors opened onto the house, and she went to find her children.

The silo doors were four hundred and six tonnes each and they had not moved in eleven years.

They moved now. The cliff took the load first — Aria felt it through the frame's feet as a long grinding complaint in the bedrock, granite giving up a decade of salt and settlement — and then the sea came in over the lip and sheeted down the inner face of the doors in a solid grey curtain. The pumps below took it. The pumps below were rated for ingress at forty litres a second and they were receiving something on the order of nine hundred.

Two of the four dropped offline in the first six seconds. He watched their telemetry go amber, then dark, and felt nothing about it. They had held the water back until the water stopped mattering. That was the entire specification of a pump.

Above the opening, the sky over Halcyon was the wrong colour.

Not dark. That was the thing he would have said, if anyone had been left to ask. It was not dark. It was bright, in stripes, in the places where the Ring was coming apart and re-entering.

Mission clock read 00:03:51.

Late, he thought, and did not elaborate.

Unit-01 stood in its cradle with its arms at its sides. Twenty-one metres, nine hundred and forty tonnes dry, Gundarium Epsilon over an eleven-layer nano-laminate over a morphic core that was not, strictly, a material at all, but an argument about materials that had run for a hundred and thirty years and won.

He had built it in a hole under his own house. He had registered it with the Council as a fabrication testbed, and that had been true in the way that a knife is a machined edge.

The cradle jaws retracted in sequence, shoulder then hip then heel, and the frame took its own weight, and the deck plates under it reported four hundred and seventy kilopascals and held.

He put his hands into the interface gel. The seat closed over his skull with a sound like a book being shut.

Then the Psycho-Frame woke up.

A Halo Link was a conversation.

You thought, and eighty milliseconds later the machine agreed with you, politely, the way a good clerk repeats an instruction back before executing it. Every Aetherian pilot alive had learned to fly inside that eighty milliseconds — to throw intention out ahead of the body, to aim at where the fight was going to be, to compensate, forever, for a lag that could not be switched off. It was safe. It was governed. It was one of the reasons the Concord had gone a thousand and six years without needing to be good at this.

The Psycho-Frame was not a conversation.

It arrived all at once, and from the inside.

He had feet. He had always had feet. Now he had feet that were four metres long, standing on wet basalt at nine degrees off level, and he could feel the nine degrees, and he could feel the wet as a change in the friction coefficient reported by two hundred and forty pressure cells in each sole. None of it came to him as data. It came as sensation. The way an ankle tells a man about a floor.

His skin went out and out and did not stop. The shoulder plating was his shoulders. The intake vanes down the spine were something between gills and the small of his back. Coolant moved through the torso manifolds at nine hundred litres a minute and he felt it the way a man feels cold water going down.

And underneath, where his heart should have been reporting, there were two of them. The drives lit and settled into their idle harmonic and his chest acquired a second pulse, slower than his own, enormous, patient. Two hundred and ten megawatts breathing in the dark.

Oh, he thought.

That was all of it. A hundred and seventy-four years of careful sentences, and what came out of him at the moment of contact was one syllable.

It was not protest. It was appetite.

He understood immediately why the safety literature on neural coupling had been written by people who had never done it. They had used the word disorientation. It was the opposite of that. It was the most oriented he had been in his life. Every ambiguity in his body — the stiffness in the left knee, two decades of bad sleep, the cold hands Elizabeth complained about in bed — was gone, replaced by a machine that reported itself honestly, answered instantly, and wanted very much to be used.

He was, as of 00:04:06, the most dangerous object in the galaxy.

He was also already dying, and there was a gauge for it in the lower left of his vision.

COUPLING 55.0.

He had set that boot value himself. Fifty-five was the number at which a man his age could hold a Psycho-Frame all day and walk away with a headache and a slight difficulty finding his car.

Full authority over Unit-01 — the wings, the funnel array, the field, the buster rifle at anything past a third of rated draw — required roughly eighty-five.

His own certified ceiling, measured six years ago in this hangar, on a Tuesday, by a diagnostic rig he had also built, with nobody watching, was sixty-one point four.

Above sixty-one point four the frame stopped reading his nervous system and began writing to it.

He had known that number about himself the way other men know their weight.

Fifty-five was already too much. Pressure behind the eyes. A metallic wrongness in the roof of the mouth. And a sense — completely false, and he catalogued it as false in the same second he had it — that he was slightly larger than the room.

The silo mouth was above him and full of burning sky.

He said, aloud, to nobody, in the voice he used for reading specifications: "Ascent."

The drives took him.

Nine seconds from the cliff to the top of the weather. Eighteen more to the thermosphere.

He went up through the layer where the Ring was coming down and threaded it without deciding to, the way a man goes through a doorway. Two hundred kilos of interdiction node passed within eleven metres of the head. He noted the miss distance. He did not adjust for it, because he had already adjusted.

Below and behind, Halcyon was still white.

He did not look.

At 00:05:40 the tactical net handed him the Dominion order of battle in one dump, because Concord Traffic Authority, in the last four minutes of its existence, had been doing its job perfectly and counting everything that moved.

One thousand two hundred and forty warships.

Mobile suits, estimated: fourteen thousand, plus or minus four hundred.

He held the figures and ran the only arithmetic that mattered. It took under a second and the answer was no.

Not unlikely. Not without reinforcement. No. There was no arrangement of one machine and one man that ended with twelve hundred and forty hulls turning around.

So the question was not whether he could win.

The question was: what can be subtracted, at what rate, and is the total long enough to matter to anyone.

He set it aside unanswered, because there was a carrier at eleven thousand kilometres running a launch cycle with its bay doors standing open, and the wings were ready.

The wings of Unit-01 were not wings. They were field emitters, and when they extended and lit they made a shape the specification called a planar exclusion envelope, and everyone who had ever seen it called light.

They opened.

The carrier was fourteen hundred metres long. Kaelic build. Wedge hull, grey, no ports of any kind, and Aria had exactly enough time on approach to note the absence of windows and to find it obscene — they do not look at where they are — and then he was on it.

He did not stop. He did not turn. He passed at eleven kilometres a second with the port wing extended, and the carrier opened along its own keel.

That was all of it. One pass. No flash, no shock, nothing but a long silent parting and then atmosphere leaving through the seam in a plume two kilometres long, carrying with it fittings, deck cargo, a launch tractor, and a great deal of what had been standing on the flight deck waiting to be told to go.

Aria kept going. He listened.

The Dominion fleet took eleven seconds to understand.

He knew it was eleven because he counted, and because their comm discipline was excellent and their encryption was not — not against a man who had spent eleven years underground with nothing to do but think about how signals move.

Seconds one through four: nothing.

Second five, a woman, bored: "Bay four, status."

Second seven: "Bay four."

Second nine, a different voice, older, flat: "Structural. Somebody pull the yard file on her keel, she was rewelded at Tessek."

Second eleven, a third voice, and this one had changed — not frightened, simply reallocated, the way a man moves a chair: "Not structural. Contact. Single contact, high closure. All screens, weapons free, cone two-two-zero, assume it is inside us."

Eleven seconds. He filed it.

It was the fastest institutional response he had ever measured, and it told him the shape of the next hour. These people would not break. They would not rout. They would not do one stupid thing out of fear.

They would simply keep being correct at him until he stopped.

COUPLING 56.4.

He brought the funnels out at 00:07:12, over the Vesh-side flank, into a screen of forty-one hulls in overlapping cover.

The mother-mounts across the back of Unit-01 were cut for twelve.

Eight came off.

He had done that himself, on Day minus twenty-nine, by reassigning four fabricators off the fin-funnel line to Unit-02's spine. He had said confirm to a console in an empty room. Four funnels that would have existed did not exist. The four empty cradles were still on his back and he could feel them the way a tongue finds a gap.

Unit-02 had gone out under a manifest for agricultural machinery, ninety-two percent complete, into a hole under a dead observatory on a world with nothing on it worth the fuel.

Four funnels was the price. He had decided the price was correct at the time and he declined to reopen it now, and then he stopped thinking about it altogether, which was a discipline he had spent a whole life acquiring and had never before needed at this size.

Eight went out.

Each was a hundred and ten kilos of independent drive and emitter, and each was a separate limb, and holding eight limbs in eight places while also being a twenty-one metre body is not a thing a human nervous system is built to do. He managed it by refusing to model it as eight objects. He modelled it as one object with a complicated boundary.

They went around behind the screen along eight arcs and fired inward, and the Dominion cover formation became a formation being shot from inside itself.

An escort's forward magazine let go and took the frames still racked in its throat. The escort beside it lost its dorsal third and yawed into its own screen-mate. A line cruiser turned to face the threat correctly and presented its engineering spaces to a funnel that was already behind it.

Nineteen hulls in forty seconds. Then twenty-four.

COUPLING 61.0.

61.4.

62.

63.

Something warm arrived on his upper lip.

He touched it with the back of his hand — his real hand, in the gel, a small movement in a small space — and looked at it. Blood. A good deal of it, steady, from the left nostril. He tipped his head fractionally forward so it would run down onto his chest rather than back into his throat, because a man choking is a man not working.

"Noted," he said, and went back to the funnels.

The dreadnought came up out of the Vesh shadow at 00:11:30. Sovereign-class, three thousand two hundred metres. Her name was THEREFORE.

Sovereigns carried a spinal battery capable of holing a moonlet. It was charging. He could see the bloom in infrared, heat rising along the whole dorsal line, and the curve gave him seventy seconds to release.

He had one answer, and it was expensive.

The Twin Hyper-Mega Buster Rifle came off the back rail and locked into both hands, and the frame told him, in the honest way the Psycho-Frame told him everything, exactly what it would cost. Full dump of the photon bank. Ninety-one percent of stored charge. Four hundred and ten seconds to recover from the drives, and for four hundred and ten seconds there would be no field slingshot, because the slingshot drew from the same bank.

Four hundred and ten seconds of being an ordinary, very fast, very well-armoured machine, in the middle of a fleet.

He took the shot.

There was no recoil in any direction that mattered and no sound at all, and afterward there was a line drawn through space three hundred metres across that did not close for eleven seconds.

THEREFORE stopped being a shape. The forward eleven hundred metres went to plasma. The remainder kept moving, ragged, venting, still under thrust because nothing aboard was left to tell the engines otherwise.

Behind her, in the same line, a battle cruiser and a fleet tender holding station in her shadow. Which was doctrine. Which was correct. Which had been correct across twelve conquered galaxies.

Both gone.

Three ships. One trigger. He logged it.

Then the bank read nine percent and the Seirs arrived.

They came in a stream — forty, then sixty — interceptors, small and ugly and quick, and their pilots had no governor and no lag and they flew as though the frames were their hands.

He fought them at knife range for six minutes with a beam sabre and the mass of his own machine, and none of it was elegant. He put a foot through one cockpit and felt the deck of it fold. He took another apart at the shoulder joint and used the arm as a club until the arm came apart too. A Seir got inside the wing envelope and put forty rounds of hard slug into the left hip at two hundred metres, and he closed a hand around its head and shut the hand, and the sound came up through the frame into his back teeth. A short wet crunch. Then a rattle as pieces went down the outside of his leg.

The micro-repair lattice found the hip and began work. It moved across the wound the way frost runs backwards off a window. He felt it as an itch he could not reach.

Somewhere in those six minutes an open Concord channel came through, unencrypted, because everything Aetherian was unencrypted, because a thousand and six years.

Young voices.

"— it's not answering, it's not answering, it's a full second behind —"

"It's not a second, it's eighty mill—"

"Ferreiro. Break left. Break LEFT—"

Then carrier tone. Then not even that.

Aria knew the name. A broad loud boy who had eaten at his table twice and had, on the second occasion, tried to explain a horse-racing system to Elizabeth for forty minutes while the pie went cold.

He held it for one and a half seconds.

Then he put it down, because the bank was at forty percent and a cruiser division was consolidating at nine o'clock high.

COUPLING 66.8.

At 00:19:04 he reached down with his right hand, into the small dark space where his real body was, and pulled the limiter card out of its slot beside the seat cradle.

It was a physical card. He had insisted on that during design review, against advice, and had written a two-page justification nobody read. Eleven centimetres of laminate with a hard ceiling burned into it in a machine-readable pattern he could have recited from memory. Sixty-one point four.

Software can be argued with. He had wanted a thing that required a hand.

He used the hand.

The card came out with a small click. The gauge stopped being amber and became a number, running free, with nothing above it.

He put the card in his breast pocket. Dropping it seemed untidy.

At 00:21:15 the left hand stopped answering.

Not the frame's. His.

He noticed because he went to trim the coolant bias with a gesture he had made ten thousand times, and the gesture did not occur. The arm was present. He could feel the gel packed around it. The hand received the instruction and declined it, or did not receive it at all.

He tested twice. Nothing.

The frame's left hand worked perfectly, because the frame's left hand was no longer being driven by that part of him. It was being driven by the part that was becoming the machine.

COUPLING 68.2.

He recorded the correlation properly, in sentences, because it was the only measurement of its kind that would ever be taken. Sixty-eight point two. Loss of contralateral fine motor control in the biological limb. Abrupt. No pain, no prodrome, no compensatory tremor.

Nobody in the Reach had that data point. Nobody in the Reach was going to get another, because there was one Psycho-Frame flying and it was not going to land.

The bank came back at 00:22:41 and he used the slingshot.

The GN field went hard around the hull and inside it the mass of Unit-01 became a negotiable quantity. He pointed himself at a formation eleven thousand kilometres away and let go.

There is an honest way to describe near-c and it is not the way the poets have it.

The stars ahead went blue and crowded into a tight bright knot in the middle of his vision. The stars behind went red and then went away. The sky he could see narrowed to about forty degrees of hot white-blue with black around the rim, and everything inside that forty degrees was early — it was where things had been, arriving all together, out of order, so that he saw a missile launch and then saw the ship that had launched it still closed.

Frame skin went from four hundred kelvin to twenty-nine hundred in under two seconds. Not friction. There is nothing out there to rub against. It was the field working, and the field makes heat the way an anvil makes noise.

The Gundarium held. The laminate beneath it delaminated in three places along the leading edges of the shins and the left shoulder, and the micro-repair lattice spent eleven kilos of reserve mass putting it back, and reserve mass was the only currency he had that did not regenerate.

To the Dominion it read as teleportation. He knew because he heard them say so.

"Contact lost, bearing one-four-one."

"Contact is at seven kilometres."

"Say again your range."

"Seven. It is inside the screen. It is inside the—"

He arrived in the middle of a cruiser division at four percent of light and did not decelerate so much as cease, which the field permitted and his skeleton very nearly did not. He tasted more blood. Something in the left side of his ribs made a noise he chose not to investigate.

Then he took the division apart in twenty-two seconds with the wings and six funnels.

Six. Two had not survived the acceleration, and he had not registered losing them.

Six of twelve. Six of the eight that four fabricators had left him.

COUPLING 71.9.

At 00:26:03 the colour went.

He was tracking a picket line and the universe turned to greys. Not gradually. Like a switch thrown in another room.

A burning hull in front of him had been orange, and then it was a bright mid-grey. Vesh, hanging huge off to starboard, went from pale gold to the colour of old paper. Ilma was a white pinhole and remained one, and he supposed that was the only object in the sky that had lost nothing.

He interrogated his own instruments and confirmed they were rendering correctly and that the fault was in him.

Loss of chromatic perception at seventy-four point one. Bilateral. Abrupt. No scotoma. Acuity unaffected.

In another life he would have written it up. It would have gone into a journal and some careful young person would have read it and been careful.

He fought the rest of the battle in monochrome and it made no operational difference at all, which he found, at a distance, interesting.

Moonlight Butterfly at 00:31:50.

He had built it as a decommissioning tool. That was true and he would have said it under oath.

Morphic nanolattice was a construction discipline. You seeded a volume with programmable dust and instructed it to take a derelict hull down to sorted feedstock over eleven days — cleanly, no debris field, no salvage crews, nobody dying in a suit with a cutting torch because the torch had found a void full of residual propellant. He had presented the paper at Halcyon at ninety-one. There had been applause, and then a very long argument about licensing.

The dust does not care what it has been told to disassemble.

He opened the dorsal ports over the reserve sector — a rough cube nine hundred kilometres on a side, one hundred and fourteen hulls holding formation, waiting to be told when their turn was — and released thirty-one percent of Unit-01's remaining lattice mass as a cloud.

The wings lit and drove it through them.

There was no explosion. That was the thing about it.

The dust went into intakes, into radiator fins, into seams and open bays and the gaps around shaft seals, and it began working on the specific molecular bonds it had been given. One hundred and fourteen reactors detected containment degradation and scrammed themselves, correctly, in accordance with their own excellent engineering, inside nine seconds of one another.

Then the sector went dark.

Not dark like a detonation. Dark like a street.

Running lights out. Drive plumes out. Attitude jets out. One hundred and fourteen wedge hulls, grey, no windows, turning very slowly, still holding roughly the shape they had been ordered into.

The reactors would not restart. The scrubbers would not run. The heaters would not run.

He knew those numbers too. Kaelic capital hulls carried between eleven and nineteen hours of passive atmosphere depending on class and complement. After that it was the carbon dioxide, and it was not quick.

Two hundred and forty thousand people, near enough.

The distress channels came up ninety seconds later. All at once, on the emergency band, in Kaelic. He had built the translator into the frame eleven years ago because he had thought it might one day be wanted for a rescue.

"— no power, no power, request tow, any hull, request tow —"

"— compartment nine is sealed, we have ninety in compartment nine, we have ninety —"

"Any hull, this is PREMISE ancillary, we are dead, we have no reactor, please —"

And one voice that was not a bridge voice. Some rating somewhere, repeating a number. It took Aria four repetitions to understand that the number was a berth designation, and that the boy was telling anyone listening exactly where to come and get him.

He could have muted the band. It was less than an instruction. It was an intention, and the frame would have done it before he finished having it.

He did not.

He had made the dust. He had signed the paper. If the sound of it was going to exist, it would exist in the head that had done the arithmetic.

He flew on with two hundred and forty thousand people talking in his ears, and he worked.

COUPLING 77.4.

At 00:34:10 a new carrier signal came up on the same emergency band, high power, unencrypted, deliberately so.

The voice was unhurried and pleasantly pitched and did not rise once.

"This is Darvhen Kael. I am told there is one of you."

Aria said nothing. He put two funnels around a picket destroyer's stern and cut her drive cone off at the throat.

"I have been shown the sector you turned off. My engineers cannot agree on whether it was a weapon or a process. I would like to know which you consider it to be."

The destroyer went end over end and struck her own escort. Aria pulled the funnels home along a curve that kept them out of the shell's firing lanes, and while he did it he opened the channel, because the answer took less than two seconds and he found that he wanted it in the record.

"It is a decommissioning tool," he said.

A pause. Not a long one.

"Thank you," said Kael. "That is worse, and I think you meant it to be. You understand that I will finish this regardless."

"Yes."

"Then we are not arguing. I dislike arguing." The voice stayed exactly level. "You are the best thing this galaxy has produced and it did not know what you were. That is a failure of accounting, not of you. All screens, continue."

The channel closed.

Aria took his fleet-mean estimate up by one hundred and fourteen hulls and kept flying.

He counted. Of course he counted.

He had been counting since the carrier at 00:06:20, because the alternative to counting was feeling, and he had spent a hundred and seventy-four years being extremely good at the first of those.

He did it properly at first — by class, by confirmed hull, by published complement, and the Dominion published complements, because the Dominion was proud.

Sovereign-class dreadnought: four thousand one hundred. He had eleven.

Praxis-class battleship: two thousand nine hundred. Seventy-four.

Lictor-class carrier: two thousand six hundred hands and one hundred and twenty pilots. Ninety-six, and he counted the pilots on a separate line, because pilots were inside machines and machines sometimes got out.

Line cruiser: nine hundred and forty. Two hundred and eighteen.

Escort: two hundred and ten.

Tender: sixty-one. Tenders were unarmed. He had killed nine, and he entered the nine without adjustment, because a number you adjust is not a number.

At 00:38 he caught himself using a fleet mean instead of the class tables — two thousand two hundred and fifty-five per hull, applied flat — and stopped.

The mean was faster. The mean was also wrong, and he had not chosen it. It had happened to him. Same category of event as the hand.

Symptom. Log it. Arithmetic degrading ahead of vision.

He kept the mean, because he no longer had the capacity for the tables, and flagged the total as an estimate.

At 00:41:19 he ran it.

One million, nine hundred and sixty-one thousand, four hundred. Plus or minus three percent.

Plus four thousand eight hundred pilots.

He had spent a hundred and thirty years in front of committees explaining that morphic nanolattice was a construction discipline. He had said the phrase in nine languages. He had put it in the abstract of the founding paper. He had once been sharp with a Directorate procurement officer about it and had apologised the same evening, by letter, in his own hand.

One million, nine hundred and sixty-one thousand, four hundred.

More people than lived in Halcyon.

He carried it. There was nowhere to set it down.

At 00:44:00 he did the honest sum.

Rate: four to six hulls a minute, falling, because the survivors were learning him. Ammunition was not the constraint. Lattice mass was not yet the constraint. He was the constraint.

Degradation: four data points on his own decline — sixty-three, sixty-eight, seventy-four, seventy-seven point four — and the spacing between them shortening. He fitted a curve in about two seconds, disliked the fit, re-ran it, got the same answer.

Eleven to nineteen minutes of useful function remaining. Call it fourteen.

Fourteen minutes at declining rate, against a fleet that had already lost — he checked — four hundred and ninety-one hulls.

Total achievable: about eight hundred and seventy.

Seventy percent, near enough. And not one ship more. Not with any tactic, not with any risk he was prepared to take, not with any arrangement of the mass remaining to him. Eight hundred and seventy was what the universe was offering and there was no negotiating with the offer.

Three hundred and seventy ships would outlive him.

Three hundred and seventy ships was enough to take Aurelion. It was enough to take it twice, with a rehearsal.

So he was not saving the Reach. He wanted that plain in his own head, undressed: the Reach is lost, I am not saving it, and nothing in the next fourteen minutes changes that.

Which left the question he had set aside at 00:05:40.

What was he buying.

A window. He was buying a window, and a window has dimensions, and dimensions can be worked backwards.

The capsule in the Lumengarde cellar was a two-berth deep-transit pod on a blind randomised vector. A blind jump required a clean shell — no active interdiction mass within eleven thousand kilometres of the launch cone for the whole of spin-up, or the vector solver would refuse and hold. It would hold politely. It would hold forever, while people came down the stairs.

Spin-up: one hundred and ninety seconds.

Load, seal, cycle the cradle: four minutes, if the person doing it was calm and did not stop to argue.

Elizabeth would not argue. Elizabeth would have the sum finished before the pod did.

Descent from the roof: sixty-one steps at his daughter's pace was nine and a half minutes, and he refused to plan around anyone carrying her, because she would not allow it and there was no time budgeted for that conversation.

Two minutes of slack, because there is always something.

Nineteen minutes.

He needed the Dominion's orbital pickets held out of a specific eleven-thousand-kilometre volume above the cliffs west of Halcyon, for nineteen consecutive minutes, beginning no later than 00:47.

That was the objective. That was what the most dangerous object in the galaxy was for.

He re-tasked at once. He stopped killing the ships that were easiest to kill and began killing the ships nearest that volume, and then the ships nearest to being able to reach it, and he stopped caring entirely about tonnage or value or the order in which they came.

It cost him rate. Five a minute went to just under four. The projected total came down from eight hundred and seventy-five to about eight hundred and seventy, and he accepted that, and entered it.

Nineteen minutes. Anything past that is surplus.

He did not think about what would be inside the capsule. Above seventy-five, images had begun arriving with more force than they were worth, and images were expensive.

He thought about the volume, and the vectors, and the pickets.

At 00:49:30 he lost a word.

He was routing the remaining funnels — four now; two more had gone somewhere in the last engagement and he had not registered that either — and he needed to set a recall priority, and the priority was for the person the whole schedule was built around, and the word for what she was to him was not there.

Not forgotten. Not close. The slot was empty and the slot had a shape and nothing would go into it.

He waited one second. Nothing came.

So he routed around it, the way you route around a failed bus. The small one. The white cardigan. The one who sends the drone to hover over my desk when I have been down here too long.

The schedule held.

Seventy-nine point one. Semantic access. One specific noun. No aphasia in operational vocabulary.

COUPLING 79.1.

81.0.

At 00:53 he fired the buster rifle, and forty seconds later moved to fire it again and could not establish whether the first shot had happened.

There was a hole in a formation that had not been there before, which argued that it had. The bank read sixty-two percent, which argued that it had not. The log would have told him in a quarter of a second, and he discovered that he had already looked at the log twice and could not recall what it said either time.

He solved it by firing again.

A duplicate into a fleet is a forgiving error.

Something large stopped existing and he was not entirely certain what it had been.

Then he held himself still for one full second — an enormous, unaffordable second — and made a determination deliberately, in complete sentences, in his own internal voice, because he wanted it recorded somewhere even if the only record was a man in a hole in a machine.

I am no longer certain of my own outputs. From here the arithmetic is unreliable. Continue. The pickets do not require me to be accurate. They require me to be present.

COUPLING 83.6.

They got it right at 00:58.

He had been waiting for it in a professional way. Fifty minutes of learning him — how the slingshot telegraphed in the field bloom, how the funnels' return arcs bent, how long the bank took, that the wings had an inside — and then three hundred and eighty hulls did the correct thing simultaneously.

They stopped chasing. Entirely.

They formed a shell at range and fired into the volume he occupied rather than at the point he was at, continuously, in overlapping sectors, with no gaps and no let-up and nothing brave anywhere in it. It was the most professional thing he had ever watched anyone do.

There was no path through it that did not involve taking hits.

He took hits.

The left torso went first. Laminate failed across a two-metre panel, all eleven layers, and the micro-repair lattice went to it and could not keep pace, because damage was arriving faster than there was mass to spend. So the lattice began to triage. It stopped repairing the arm to hold the torso. Then it stopped repairing the torso to hold the drives.

He felt that as numbness down one side, which was accurate, and as heat, which was also accurate. Coolant loss fourteen litres a second, then no reading at all.

The right leg came off below the knee at 01:02. He did not miss it. There was nothing to stand on.

Frame reporting: thirty-one percent structural integrity and falling. Forward drive eighty percent, aft drive forty-one. Four funnels. Buster rifle nine percent. Lattice reserve exhausted.

Mission clock 01:04:10.

Nineteen minutes from 00:47 put the end of the window at 01:06.

A hundred and ten seconds to buy.

He turned Unit-01 toward the densest part of the shell — the sector directly between him and the volume above the cliffs, forty-odd hulls stacked close, because close was safe from a thing that liked to arrive between ships — and put everything remaining into a straight line at them.

Two things first, in order, the way a man checks a stove on his way out of a house.

One. He queried the dead-man protocol. It answered from a server three hundred and forty metres beneath his own roof, which was, as of ninety seconds ago, no longer beneath anything. ARMED. Absence of cardiac and neural signature, three hundred consecutive seconds. Payload: access keys, coordinates, the full sync-curve dataset including his own figure. Destination: one Halo Link, registered to a cadet at the Aureate Academy.

No message. He had tried on Day one and got eleven words in and deleted them. A key, a place, and a number. Words had been Terrick's faith, and Terrick was four days dead on a cold station at the Vesh trojan point with a Kaelic officer's short blade in him.

The boy will work it out. He works everything out. It is the entire problem with him.

Two.

He let himself have one.

Sea bream. She had scored the skin three times on each side, because that is how it does not tear. She had held the knife up to show him. Her hands were wet.

Ilvaren, she called him. It meant the one who is late.

The shell fired into the volume he was in.

Unit-01 went into them with one leg, one arm, thirty-one percent structure, and both wings open, and for four seconds it was very bright in a great many places at once.

At 01:06:02 the containment on the forward drive failed in the manner it had been designed to fail, which was completely.

Twelve more hulls went with him.

Eight hundred and eighty-two.

The blast front moved out through the sector at eleven kilometres a second and thinned to nothing, and behind it the wreckage sorted itself by mass, the way wreckage does.

Most of Unit-01 was vapour. Some of it was not. Fragments of Gundarium Epsilon — hundreds, from fist-sized to eleven metres — went out across a hundred and forty thousand kilometres of battlefield, still white along the fracture faces where the alloy had gone superplastic before it broke, cooling as they went, and most of them would keep going for a very long time.

One piece tumbled end over end at four revolutions a minute: the outer third of a fin funnel, sheared at the emitter collar, drive nozzle intact, casing scorched to bare metal on one face and untouched on the other.

Its running light was still lit. Small, steady, amber, blinking at one hertz, as regulation required, so that nothing would collide with it.

Nine minutes later a Dominion recovery tender — unarmed, sixty-one crew, a working ship in a fleet of three hundred and seventy survivors — put on two degrees of starboard yaw and a gentle burn, and began to close.

The plot table on the flag deck of the Conclusion was two and a half metres across, and it rendered the Aurelion system in blue line-light, and every hull in the Dominion order of battle stood on it as one point with a four-character designator beside it.

When a hull died the point went out and the table ticked.

The tick was a soft mechanical click, specified forty years ago by an acoustics board because it carried across a working deck without lifting anyone out of his chair. Overlord Darvhen Kael had approved that report himself. He remembered thinking the sound was well chosen, and that he would hear it perhaps three times in a sitting.

The table had ticked for twenty-six minutes.

It had stopped ninety seconds ago. He was still at the rail with both hands on it. Behind him the flag deck had gone quiet in a way that had nothing to do with discipline: eleven people, no keystrokes, waiting to be told how to feel about it.

The Conclusion herself was warm through the deck plate. Number four radiator bank had been holed by a spar of somebody else's ship and shut down at 0912, and the scrubbers had been running one stage over ever since, and the air on the flag deck smelled of hot dielectric and the sweetish burn of a coolant line that had boiled dry somewhere three decks under his feet.

"Confirm the count," Kael said.

"Eight hundred and seventy hulls lost, Overlord." Marshal Rhask kept his voice level. It had cost him something. "Three hundred and seventy combat-capable remain. Two of those are structural. The Corollary has lost both dorsal banks and is venting at nine hundred litres a minute; she cannot take another burn above a quarter gravity without opening her spine."

"Mobile suits."

"Nine thousand four hundred and eleven confirmed destroyed. Four hundred and six recovered damaged. Recovery ongoing."

Kael did the arithmetic standing still, because he had never needed a slate for it.

Eight hundred and seventy hulls. Mean complement across the wedge classes, one thousand one hundred and forty. Nine hundred and ninety-one thousand eight hundred crew, less whatever fraction reached the pods, and a Kaelstrom line pod was rated to launch inside eleven seconds and almost none of those ships had been given eleven seconds.

Nine hundred and sixty thousand dead. He would revise it upward later. The revision was always upward.

Twenty-six minutes. Eight hundred and seventy hulls. Thirty-three and a half warships a minute.

One machine.

"Overlord," Rhask said. "Your orders."

Kael found that he was smiling and did not trouble to stop.

"Do you know what we have just been handed?"

Nobody answered. He had not expected it. He turned from the table and looked at the deck — at Rhask, at Fleet-Master Sevrin Adaal with her burned hands folded behind her, at two analysts young enough that this was the first bad day of their careers and would now be the standard against which they measured every other, and at a signals rating who had been crying, and had stopped, and was standing very straight about it.

"Twelve galaxies," Kael said. "Four hundred and six years. Sixty-one campaigns. In all of it we have lost eleven hundred hulls. Total. And in twenty-six minutes, in a system with no war doctrine, no veterans, and no standing fleet worth the noun, one pilot in one frame took eight hundred and seventy of them off me." He laid his hand flat on the rail. "I have waited a long time for somebody to be that good."

"Overlord," Adaal said. "With respect."

"Always."

"I recommend withdrawal to the Vesh trojan and full reassessment." She said it clearly, and she said it on the deck instead of privately, and Kael marked that and approved of it. "Our doctrine assumes we absorb attrition faster than an enemy generates it. The yards deliver eleven line hulls a month at surge. For twenty-six minutes that assumption was not merely wrong, it was inverted. We do not know whether that frame was unique. If there is a second, and it launches inside the hour, this posture loses the fleet and the fleet is not replaceable inside four years."

"How long would you want?"

"Ninety days. Sixty if the yards prioritise."

"And in ninety days, what does the Reach do?"

Adaal did not flinch. "Arms, Overlord. As fast as it can."

"Yes. It does. And it would be superb at it, because it is a wealthy, patient, disciplined civilisation with a thousand years of industrial slack and, by the end of this week, every reason there is to hate us." He turned back to the table. "Fleet-Master, your reasoning is sound and your conclusion is wrong, and I want you to know why, because I intend to keep you. Bring up the debris field."

The display slid and re-scaled. A long tumbling smear on the detonation vector: thirty-one thousand kilometres of it, still opening at four hundred metres a second, the larger pieces reading hot on the thermal overlay and the small ones reading as nothing at all.

"There is no second machine," Kael said. "If there were, it would have launched. A man who is prepared to die at the twenty-sixth minute is not a man holding a reserve. He was alone. He was always alone. That was not a fleet. That was one household." He tapped the rail once. "And a household is a thing you take before it becomes a fleet."

Adaal was quiet for three seconds. "Understood, Overlord."

"Enter your recommendation in the record with the objection intact. I want it there. If I am wrong within the hour, I want whoever inherits this fleet to see that a competent officer said so out loud, and to know that listening to you is cheap." He glanced at her. "Do that before you do anything else."

"Yes, Overlord."

The deck settled, and it settled quickly, the way a deck does when nobody has been shouted at. He had learned that young, on Meredath, back when he still shouted. Terror makes a crew obedient and slow. An argument makes them fast. He had never in his life given an order he could not defend, and the return on it was seventy thousand officers across twelve galaxies who could each defend it for him, unsupervised, at range, in the dark, without asking.

"Say the thing you are all holding," he said, "and then we will be done with it. You are thinking the Reach did not deserve this. That they had a thousand and six years, and we walked into a garden with a knife."

Nobody took it.

"They did have a thousand and six years," Kael said. "It is a remarkable number and I do not sneer at it. But a peace that has never once been defended is not a peace. It is an assumption nobody has audited. Everything that holds a shape is holding it because something is paying for the shape — a star pays for its own light until it cannot, and then it does the other thing, and we do not call the star cruel. The Reach spent a millennium drawing down an inheritance and calling the drawdown a virtue. Four hundred security frames. One low-yield carbine apiece. A traffic grid built to shepherd rocks. And in a thousand years, in that white room of theirs, not one of them stood up and asked what the number four hundred was for."

He shrugged, barely.

"A war is an argument carried to its conclusion. It is the only argument that cannot be deferred, which makes it the only one that gets an honest answer. I did not come here to destroy them. I came to finish a sentence they have been leaving unspoken since before my grandfather."

Nobody applauded. He would have been irritated.

"Identification."

Korran, senior analyst, had been holding a slate in both hands and waiting for the word. "We have it, Overlord. Frame designation off handshake fragments in the telemetry: internal label Unit-01. Hull material is not in any table we own — provisional designation Gundarium Epsilon. Density behaves like a lattice under load and like a monocrystal under beam. Point of origin is a subsurface facility three hundred and forty metres beneath a private residence on the coast above Halcyon. The estate is called Lumengarde." A pause. "The pilot's biometric was in the Concord civil register. Aria Zadkiel. One hundred and seventy-four. High Councilor."

Kael did not move for four seconds.

"Say it again."

"Aria Zadkiel, Overlord."

"Matter is not a noun." He said it slowly, reading it off the inside of his own skull. "It is a standing agreement between load and time. An agreement, being a thing we wrote, is a thing we may renegotiate." He looked up. "Twelfth line of the introduction to the monograph on morphic lattice reflow. I read it thirty-one years ago in translation, then had it retranslated, because I did not believe the first man had got it right."

Rhask said nothing. Korran said nothing.

"I have read four papers by that man. I have quoted him to my own engineers, in that room, with the doors shut. I took him for a laboratory theorist who had never been out of atmosphere." He put both hands back on the rail and looked down into the wreck light. "He wrote that. Then he went into a hole under his own house and built that. Then he flew it at us with no wing, no relay, no doctrine and nobody on the far end of a channel telling him what to do — because there was nobody in that entire galaxy qualified to tell him anything."

He was quiet a moment.

"And they did not know. Look at their traffic. Their Ring commander was still transmitting deconfliction advisories at minute nine. Their Council did not know. Their own Directorate did not know. He built the most significant weapon system produced in this galaxy in a thousand years and kept it in a cellar, and the civilisation it belonged to slept on top of it for years without once asking what the hum under the floor was."

His voice did not rise. That was the part the deck would carry home.

"A galaxy that hides its only weapon under a house has already decided what it thinks of itself. They did not lose today because we are stronger. They lost because the one man among them who understood the century he was living in could not find a single other person worth telling. That is not a tragedy. That is a verdict."

He straightened his cuffs.

"Orders. Rhask, log as given."

"Logging."

"One. Every recovery tender in the fleet, including hospital-attached, to the debris field on the Unit-01 detonation vector. Every fragment above one hundred grams. Lattice, spar, cockpit ceramic, any part of the fin funnel array, and the pilot's interface hardware if there is anything of it left. Grid the field, sweep it twice, picket it for six days." He looked at Rhask. "This has priority over survivor recovery. Say it back."

Rhask's jaw moved once. "Recovery of materiel has priority over recovery of personnel, Overlord."

"Yes. Our own people will die in the pods while the tenders lift scrap. I know the number. I am not going to call it small and I am not going to dress it. What is in that field is worth a war. Our dead are worth a war also, and they are already spent. That is the whole of my reasoning. Any officer may file against it."

Nobody filed.

"Two. Ground insertion at Halcyon at local dusk, down the eastern tether." He recited it, precisely, because he had read it three times. "The eastern tether, at dusk, when the queue clears. It is the only line rated for delegation mass at speed — the western and northern towers cycle at reduced load after the twenty-first hour, and the southern is not tied into the orbital relay net at all, only civic traffic. Attaché report, Day Minus Eleven. Filed by Legate Oris Vantalar." A pause. "That is the best intelligence product this fleet has been handed in nine years, and it was written by a man selling grain futures at a garden party. Confirm Vantalar as Praetor, effective now, with authority over ground administration on Aurelion. His merchant cover is expired as of this transmission. Tell him in those words. He will enjoy them."

"Confirmed, Overlord."

"Three." Kael touched the table and the view came in past the harbour, past the white terraces, up a coast road to low buildings on a cliff — water gardens stepped down the seaward face, a flat roof with a low iron rail around it. "Lumengarde. Vantalar takes it himself, full praetorian element. Secure the house. Secure whatever is under the house: the shaft, the hangar, the fabricators, every storage medium, and the man's working notes — paper as well as drives, because a man like that writes on paper. There will be a second frame, or the parts of one. Find it."

He straightened.

"And take the family alive if it is convenient."

Rhask waited half a beat. "If it is convenient, Overlord."

"If it is convenient. I will not spend a praetorian element or an hour of schedule on them. If they are standing in a hallway, bring them. If they are behind a door that costs me time, do not open it gently." He turned from the table. "Execute."

The deck went into work. Boards lit. Aft, forty-one tenders began their spin-up in sequence, and the Conclusion took the load through her frame as a long note in the plating that came up through Kael's boots and into his knees, the way it always did.

Alone, later, he stood at the table with the lights down.

The field had opened another eleven hundred kilometres. The tenders showed as small warm marks crawling through all that cold tumbling geometry, stopping, holding station, moving on.

"Signals."

"Overlord."

"My sector. Are the distress channels still up?"

"One thousand nine hundred and forty carriers, Overlord. Perhaps two hundred crewed."

"Here. All of them. Unmixed."

"Overlord, that will—"

"Yes."

They came in together, because that is what nineteen hundred channels are. Pod beacons underneath everything, the flat two-second pulse of a launch that worked. A damage-control officer reporting coolant loss by section and frame and litre rate to a bridge that had been gone twenty minutes. Then reporting it again. Somebody asking whether the Therefore had answered yet. A young voice saying a name that was not a rank.

Kael listened for eleven minutes with his hands behind his back.

He owed them the sound. He did not carry debts.

"Close them."

The deck was quiet. He brought the display back to the coast above Halcyon, where the light had gone long and gold across the water gardens, and checked the terminator against the tether cycle.

Forty-one minutes to dusk.

He began working through the ground order of battle, line by line, and he was thorough, and he did not hurry.

The cliff road was seven point two kilometres from the Academy gate to the Lumengarde turn. Leon had run it once in twenty-six minutes, on a bet, in shoes.

He was going to beat that.

The gate guard was not at the gate. The gate was not at the gate either — something had taken the west pillar out at knee height and dropped four tonnes of ornamental stone across the tram line. The tram sat where it had stopped, doors open, chime still going. That patient two-note please stand clear it had made every ninety seconds of his entire life.

He went over the stone and did not look inside the tram.

Behind him, down in the Academy bowl, a man on a public channel was saying the word shelters. Over and over, in the tone of a man who had been handed one word and nothing to go with it.

Eleven minutes ago Leon had seen Cass going the other way. Helmet under his arm, flight jacket half on, running for the AEGIS bays, wearing the face he wore at a card table when the cards were bad and he had decided to be delighted about it.

"Oi! Zadkiel! You owe me forty!"

"Put it on my tab!"

"You are the tab!" Cass, still running, still grinning, half turned, walking backward for two steps like an idiot. "Hey — tell your sister my mother says the blue one!"

Then he was gone into the bay traffic and Leon had turned east, toward home, because there was one thing he had to do and everything else in the Reach was not it.

Seven point two. Call it six point nine now.

The harbour road came up out of the tenement terraces and opened, and the city was below him, and the city was wrong.

Not burning. That was what he could not file. Halcyon did not burn — white stone and water, nothing in it that took a flame — so instead the city was venting. Steam. Column after column standing dead vertical in the dusk because there was no wind at that hour, and the low sun caught them, and the whole lower city stood there lit gold like a rack of pipes with the air going through.

The Vessari water garden was one of the columns.

He knew the volume. Everyone did. It was on the plaque. Nine hundred and forty thousand litres, twelve terraces, the lily basins his mother liked. Something had opened the retaining shelf and the reservoir was coming down the terrace steps in a white sheet, and the sheet was steaming, and there were people in the lower plaza who had been standing a moment ago and were sitting down in it now.

Four point two megajoules per litre for a hundred degrees. Nine hundred and forty thousand of them.

The number arrived whole, the way they always did. It told him nothing he could use. He kept running.

He stopped counting after that. Not the running. The dead.

The crowd on the harbour road was going the wrong way — inland, uphill, toward him — and it was not a stampede. That was the strange part. It was a queue. A thousand years of a people who had never once had to leave anywhere quickly, doing it politely. A man in a baker's apron shouldered past saying sorry, sorry, sorry, holding a flour scoop, for no reason at all.

A woman put a child into Leon's arms.

She did not ask. She was bleeding from the scalp and her eyes had gone somewhere else, and she pushed the child at his chest with both hands the way you push a door. The child was perhaps three. It was rigid. It smelled of somebody's kitchen.

He carried it four steps.

Then he turned and put it into the arms of a man running alongside — older, grey at the temple, a Ministry clerk's collar, somebody's father — and said, "Cliff road. Keep left of the aqueduct."

"What? I don't—"

"Left of the aqueduct."

He let go and ran.

He did not look back to see whether the man kept hold. He would look back at it for sixty years and never once find the man's face, because he had not looked at it.

One job. You have one job.

He was level with the aqueduct when the eastern tether came down.

It made no sound at first. That was what stayed: a structure nine hundred kilometres long letting go in silence, the way anything does at a distance, and the silence lasting exactly as long as the noise took to cross the gap.

The ribbon parted somewhere above the cloud deck. He saw it as a change of light — a hairline going from taut to slack, a plucked wire going fat and blurred — and then the lower run began to fall, and because it was a ribbon and not a rope it fell in curves. Kilometres of curve. It came down over the harbour district in loops, like thread off a dropped spool.

And Car Seven was on it.

Two hundred and forty metres. Eleven hundred passengers at capacity. Four thousand one hundred tonnes empty — that plaque was on a wall he had walked past every week for six years.

It came off the ribbon at about nine kilometres and turned over once, unhurried, showing its underside like a fish on a slab.

Nine thousand metres. Root of two h over g. Forty-three seconds.

Call it forty-one. Drag is nothing on that mass.

He counted. He could not stop himself counting. He ran and he counted, and the number was thirty-one when the car passed the level of the western tower, and twenty when it stopped being a shape and started being a size, and nine when it filled the harbour, and at zero the water of Halcyon harbour was not there any more.

It went out sideways. All of it. In a ring, faster than anything that size should move.

The sound arrived four seconds later and it was not an explosion. It was a slap. One flat slap, a hand on a table the width of a district, and then the ground did something that made his legs stop working correctly for two full strides. Then the debris began coming down over four square kilometres of the lower city — slowly, tumbling, catching the last of the light.

He got his legs back. He kept going.

Behind him a man was shouting at the harbour to stop.

The Lumengarde turn was at the crest, between the two old cypresses. He took it at nineteen minutes eleven and had breath enough to notice he had beaten the bet by nearly seven minutes, and to hate himself for noticing.

The house was standing.

The house was standing and the gate was open and the drive lamps had come on for dusk. All forty of them. On schedule. Because nothing had told them not to.

The front doors were open. The staff were gone.

He knew it three steps in, from the sound. Lumengarde was never quiet — ovens, pumps, the low grumble of the terrace irrigation, somebody talking somewhere — and all of that was still running and none of the talking was.

An apron on the kitchen floor. A pan on the burner with the burner off and the water in it gone flat. The side door propped with the same stone that propped it every evening for the deliveries.

She sent them home. An hour ago. She told them to take the coast road.

He was right. It would be nine years before he learned he was right, from a woman in a market on another world who recognised his jaw.

"Mother."

The study door stood open and the study hearth was lit — in summer, at dusk — and the corridor smelled of something that belonged to no part of his life: paper burning in quantity. Not documents. Archives. Somebody had carried a whole drawer to the fire and fed it in by the handful.

He put his head in. The hearth was heaped past the andirons. Council seals curling black. The blue Astraian correspondence ribbon half consumed and still blue at one end.

On the desk, squared up: a photograph frame lying face down, the backing off, the photograph gone out of it.

"Mother."

"Cellar." Two floors down and to the left. Perfectly level. "Leon. Cellar. Now, please."

He went down the service stair four at a time.

The cellar door was open, and had been open long enough that the cold had crawled six steps up into the passage. Beyond it the long vault: wine racks, the old preserving shelves, and at the far end the pod bay that had been in that house for eighty years and had never, in his lifetime, had its cover off.

Its cover was off.

The capsule sat in the cradle with every panel amber and one green. Two berths. Gel-formed, side by side, no room between them for a hand. The hatch was up, the interior lights were on, and the air coming out of it was cold and smelled of new plastic.

Pip was aboard, seated on a charge cradle bolted into the bulkhead above the second berth. Bolted freshly — the drill swarf was still on the deck underneath. Its indicator was at the dimmest setting. The setting it used when Eliana was asleep.

His mother was on her knees at the storage locker with a stylus between her teeth.

Sleeves rolled. Hair up in the fast twist she used for cooking. Ash to the elbow on her right forearm.

"Two minutes," she said around the stylus, not looking up. "Don't help. You'll unbalance it."

"Mother—"

"Two minutes, Leon."

He looked at the counter beside the locker, because it was the only place his eyes would consent to go.

Eliana's medication. All of it, out of the cabinet, out of the boxes, rebuilt: twelve blocks of blister strips, banded, each band written on in that small upright hand. MONTHS 1–3. Two at waking, one at dark. If the tremor comes back in her left hand, go to three at dark. Not four. MONTHS 4–6. MONTHS 7–9. MONTHS 10–12.

A year. She had packed a year.

Beside them, not going in: her wedding bracelet, laid out flat. The Astraian coronet pin. A string-tied stack of what he realised, after a moment, were his own school reports from when he was nine.

Going in, laid flat against the inner skin of the locker so it would not curl: a photograph. Out of its frame. The four of them on the roof, the summer Eliana was fifteen, all of them squinting into the sun.

Eleven grams of paper. She had left the frame.

She weighed it, he thought. She weighed everything in this room.

"Where's Father?"

Her hands did not stop. "Above."

"Above where—"

"Above." She took the stylus out of her teeth, sealed the locker, stood. For one second she put her palm flat on the capsule hull, the way you steady yourself on a doorframe. "Go and get your sister. Roof. She won't come."

She was on the roof.

Of course she was. Sixty-one steps, and she had taken all sixty-one of them alone, and she was standing at the low iron rail in the white cardigan and the white sneakers with her hair loose and going sideways in a wind that had not existed twenty minutes ago.

Watching Halcyon steam.

Her shoulders were working. Fast and shallow. She had climbed too quickly and she was paying for it in the only currency she had.

"Eliana."

"Don't." She didn't turn. "Don't do the voice."

"We're going downstairs."

"There's a tether car in the harbour." Thin, and very steady. "I watched it land. There was water and then there wasn't water."

"I know. I was on the road."

"Where's Papa?"

"Downstairs. Now."

She turned round, and her eyes had gone indigo — from the outside in, the way he had seen maybe six times in his life — and she read his face, which took her no time at all, because she had spent twenty-one years reading the faces of people who were managing her and she was better at it than any of them had ever been at doing it.

"You've got the voice on," she said. "The nine-years-old-in-hospital voice. You had it when they took my spleen and you told me it was a procedure."

"Eliana—"

"Where is he."

He picked her up.

She fought. He had prepared for a number of things and not for that. She fought properly, with her elbows — one of them caught him under the eye socket hard enough to put white at the corners of the roof — and she got a fistful of his collar and twisted it and hissed put me down, and she weighed thirty kilos and it changed nothing, and he carried his sister down sixty-one steps while she told him in complete sentences that she was not luggage.

"Put me down. Leon. I can walk—"

"You can walk nine steps."

"I can walk eleven—"

"You can walk nine, and then I carry you anyway, and I don't have the ten seconds."

She went still at that. Not calm. Still.

At the cellar door she said, "Let me walk in," and there was no reason on earth to refuse her, so he set her down.

She walked in. She saw the pod. She saw the twelve banded months on the counter, and Pip on its cradle with its lights down, and her mother's wedding bracelet lying on the stone where it had been put.

She saw one loaded locker.

"Mama. You packed one bag."

"I packed what goes."

"There are two beds."

"Yes."

"There are three of us."

"Yes."

Eliana's hands came up and made two fists in front of her, and opened, and hung there.

"Say it out loud." Her chin was up. "We're all so good at arithmetic in this family. Say it out loud."

Elizabeth straightened from the hatch and looked at her daughter and softened nothing.

"Two-berth deep-transit pod. Rated for two adult masses and ninety days of consumables — at your weights, with the locker stripped, eleven months. The gel forms are moulded. There is no third form. Total mass budget for a blind jump is eleven hundred kilos including hull, and I am fifty-four of them and I am also not moulded a seat."

"That's a specification—"

"It is a load rating." Still level. "It is not a decision, and I would like you to stop trying to make it one, because I need you calm for the acceleration and you are burning oxygen."

"Then take him." Eliana's finger came up at Leon, and her voice went out from under her. "Take Leon. Put me on the counter with the bracelet. I'm the one with twenty-five years on the label, Mama, I'm the one who doesn't finish — the arithmetic works, you know it works, you did it before I came down the stairs—"

"Eliana."

"Don't say my name at me like it's an answer."

"I did do it," her mother said. "Twice."

The cellar hummed. Somewhere far off, through four hundred metres of cliff, something enormous hit the sea and the wine bottles talked in their racks.

Eliana turned round slowly. She looked at the hearth-smell coming down the stair. She looked at the sealed locker.

"He knew," she said. "The Legate. At the reception, he told me about the tethers — he said the eastern one, at dusk, when the queue clears. He said the western and northern cycle down at reduced load after the twenty-first hour and the southern isn't tied into the orbital relay net, only civic. He recited it at me. Like a poem. I thought he was flirting."

Leon said nothing. There was a cold going up the back of his neck that owed nothing to the cellar.

"And it's dusk," his sister said. "And it's the eastern one. And Papa is above. And you've packed a year of my tablets and not one of your own things, and you burned the study, and you took the photograph out of the frame because the frame was too heavy."

Nobody in the room told her she was wrong.

That was when the chime went.

Three tones, low, descending, behind the bone in his left ear. The Halo Link's unsolicited-package alert — the one that came when something arrived on a channel nobody had asked to open. He had heard it four times in his life. Twice it was Academy administration. Twice it was his mother sending him a market list because she thought it was funny.

It was not Pip. Pip's distress call was three tones rising, then a pause, then three rising again, and he could have picked it out of a room full of alarms.

This was the other one. Low. Descending. Package holding.

Not now.

He set his jaw and killed it with a flick of the eye and went back to work.

He would take that half second apart for the rest of his life, one frame at a time, and never find anything in it he could have used.

The loading was the ugliest part and it was ugly because it was ordinary.

Eliana went in first, on the inner berth, because the inner berth carried the medical tie-ins and the drone cradle. She had to be lifted. She let herself be lifted, and turned her face away while it happened, and that was the first moment Leon had to stop and breathe.

The gel form was cold. She flinched.

"Arms in," Elizabeth said. "Both of them. Pip, wake."

Pip's lights came up. Three rising tones — the acknowledgement, not the distress. It dropped off the cradle, settled on Eliana's sternum, clamped, and began, absurdly, in the middle of everything, to take her pulse.

"Leon. Outer berth."

"Mother."

"Outer berth."

"Get in." He heard his own voice go flat and fast, the way it went in an exam. "Get in and I'll take the cliff stair. Directorate post is eleven minutes at a run, I'll sign out an AEGIS, I have the second-best sync figure in my year—"

"Leon."

"—there are four hundred frames on the Ring and the carbine is rated for asteroid clearance at eight hundred metres, which is a joke, but it's a joke that yields fourteen megajoules, and if I get inside their envelope—"

"Leon Asher Maximilian."

He stopped.

She took his face in both hands. Her hands were warm. That was wrong. His father's hands were the cold ones, that was the family joke, hers were always warm and they were warm now, and there was ash on them, and he could smell the burnt paper on her skin.

She said something to him in Old Astraian.

Nine words. He knew four of them, roughly, the way he knew any of it — the endearments, the ones she had used on him since he was small. The other five he had never heard her say. One had the shape of a name. She said that one slowly, twice, and watched him while she said it, the way you watch someone taking something heavy out of your hands to be sure they have the weight.

"Say it back."

"Mother—"

"Say it back to me."

He said it back. He had eidetic recall. He said it back perfectly and had no idea what he had said.

"Good." She let go of his face. "In."

He got in.

Then she leaned across him, over the outer berth, and took her daughter's hand, and put the signet ring into the palm and closed the fingers over it.

Astraian gold. Older than the Concord. It went round Eliana's thumb and was still loose.

"That's not mine." Eliana's voice had gone very small. "Mama, that isn't mine—"

"It is now."

Then she said something else in Old Astraian, to Eliana, and it was shorter, and it was not what she had said to Leon.

Eliana made a noise he had never heard her make.

His mother stepped back and hit the hatch.

Nine centimetres of transparent composite. He knew the figure because he had read the pod's plate years ago, idly, the way he read everything.

Nine centimetres. Layered borosilicate laminate, deep-transit rated, tested to fourteen hundred kilopascals.

He hit it.

He was, by every measure the Aureate Academy kept, the strongest and fastest person of his year. A hundred and eighty-five centimetres. Top of his class in three disciplines. He put his shoulder into it, then both fists, then his shoulder again, and the glass did not care.

Under the deck the launch cycle came up. He felt it in his back teeth — the tube pumping down, the induction rail taking charge, ninety on the counter and falling.

Ninety.

The interlock. There was always an interlock; an emergency release on the inside of every pressure hatch in the Reach, because it was the law. He got the cover off with his thumbnail.

The socket behind it was empty. Pins out. Leads capped. The caps were new.

She had done that first. Before the medication, before the photograph, before the study, his mother had come down here and taken the inside release out of the pod her children were going to be sealed into.

Eighty-one.

He went at the glass again. He worked the problem, because he was very good at problems.

There was no problem.

Nothing to compute. No angle, no lever, no material property, no order of inputs. Every path ran out in under a second and every one of them ended at nine centimetres, and there was nothing on the far side of it his mind could reach.

His sister was screaming behind him. Pip was going three rising tones, pause, three rising tones, on and on, because its patient's heart rate had passed two hundred and it had nothing else it could do either.

His mother stood on the other side of the glass with one hand flat against it and did not look at him.

She was watching the cellar stairs.

The doors went at sixty-four.

Not blown. Opened — the outer cellar doors carried a maintenance override on the estate network and somebody used it, and the two leaves came apart smoothly and correctly, and grey came down the steps.

Four of them first, wedge-shouldered in Kaelic infantry rig, taking the corners. Then the fifth man, unhurried, no helmet.

Praetor Oris Vantalar had not changed anything about himself since the reception. The same dark coat, the same clean line to it, the same way of coming into a room and giving it a moment before he used it. He came down the last three steps, stopped, and looked around the cellar with genuine attention.

"I was served wine from these racks," he said. "In the spring. It was very good. The seventy-one."

His eyes found Elizabeth. He inclined his head — correctly, at the exact depth Astraian protocol allows a princess of the third rank, which meant he had looked it up.

"Lady Zadkiel. I will be direct, because we have very little time and you do not require decoration."

"No."

"Terms." He opened one hand, empty. "For yourself: household rank under Dominion administration, your properties intact, your title acknowledged. The Overlord respects an abdication. He thinks it shows arithmetic. For your son: the officer academy at Kaelstrom Prime, a commission, and a frame with no governor in the link. That is not a small offer. I have read his figures, and what your Concord has been letting him fly is a waste I take personally."

"And my husband."

"Your husband is a separate question and I am not empowered to answer it." No flicker at all. It was, Leon understood a great many years later, the only completely honest sentence the man spoke in that cellar. "I would rather this family alive than dead. That is not mercy. A living Zadkiel is worth a great deal; a dead one is worth some fragments of Gundarium and a bad afternoon. I am showing you the ledger because you will believe a ledger and you would not believe kindness."

Thirty-nine.

Then he looked past her.

A small movement. Past her shoulder, at the capsule, at the lit viewport, at the girl on the inner berth with the silver-white hair and the indigo eyes and the white cardigan.

And his courtesy adjusted.

Nothing coarse. Nothing you could put a finger on. The voice did not change and the posture did not change, and something under both of them settled — the way a man settles when he has found the item he actually came into the shop for and can stop pretending to browse.

"Ah," said Oris Vantalar. "There she is."

"Praetor."

"Lady Zadkiel, the pod is not going anywhere. I have men on the rail housing and the tube is—"

"Praetor."

She stepped left. One step. She put herself between him and the viewport — unarmed, in a cook's rolled sleeves, ash to the elbow — and she was completely still, and there was nothing in her face at all.

Twenty-two.

"You have spent four days," said Elizabeth Zadkiel, "pricing a thing that was never for sale, and you will go to your grave still holding the money."

The cellar was quiet for one full second.

Vantalar's mouth moved slightly, the way a man's does when he bites down and finds a stone in it.

"That," he said, "is unkind."

He walked round behind her.

Leon saw the Verdict come out of the coat — short, straight, no guard, the kind of blade an officer wears to sign things with — and he saw the man's shoulder set, and he understood what was coming about half a second before it came.

He put his hand over his sister's eyes.

He reached across the berth and laid his palm across her face and held it, hard, and she got both hands around his wrist and pulled and could not shift it, because she was twenty-one and weighed thirty kilos and he was the strongest person in the room.

Vantalar put the blade in under her left shoulder blade. The point came out below the collarbone. She did not scream.

Eliana could not see.

She could hear.

She heard the impact. Not a slice — a knock. Blunt and low. A door pushed shut with a hip.

She heard her mother's breath catch, and the catch was wet, and it did not release. She heard the blade come back out, and that was a longer sound than going in.

She heard a knee go down against the hull. She heard the hand hit the glass flat and stay there. Then she heard her mother trying to breathe through a lung filling, which is not a scream and nothing like one: a small fast rising suck, again, again, a person working very hard at something that has stopped working.

Then the cough. And what came out of it striking the composite six centimetres from her face. And then it running.

"Leon." Her voice into his palm. Muffled. Small. Entirely reasonable. "Leon. What's that sound."

He did not answer.

His mother's hand was flat on the glass. Her mouth moved. It made no noise. One syllable.

Go.

Four.

Three.

The rail took.

Everything cut off mid-noise — Eliana's breathing, the drone's tones, the Kaelic shouting on the stair, the running on the glass — cut flat and clean, the way a sound does when the medium carrying it is suddenly nine hundred metres behind you.

The pod went up the tube and out through the cliff face into the dark over a sea with a white city burning beside it, and the drive lit, and the randomiser took the vector, and Aurelion was a bright thing, and then a small bright thing, and then a point.

And it was silent.

That was the worst of it. Not the sound. The silence after the sound, which was total, and padded, and had a faint hum in it from the recyclers, and smelled of new plastic and cold.

Eliana had stopped moving. Her hands were still on his wrist. She had stopped pulling.

Leon Asher Maximilian Zadkiel lay strapped in a moulded gel form beside his sister with his palm across her eyes, and the launch was over, and nothing was pressing on them any more, and there was no reason at all to keep his hand where it was.

He could not make himself move it.

The pod measured two metres bow to stern and one metre ninety across at the widest point, and Leon was one metre eighty-five, so he sat with his spine against the aft bulkhead and his knees folded and his boots braced on the medical locker. That was the arrangement. It was not going to change for seven hours.

The air smelled like a closed drawer.

It came through a cartridge that had been sitting in a cellar since before either of them was born. The first four minutes of it had tasted of dust and old sealant and something faintly sweet that he had decided was preservative leaching out of the berth foam. By now his nose had quit. That was the part he disliked. The smell had not gone anywhere. He had simply stopped being told about it.

The scrubber was lithium hydroxide, two cartridges, rated two hundred and eighty person-hours at nominal load. Two people. A hundred and forty hours, if nobody panicked and breathed like it.

Carbon dioxide read four hundred and ten parts per million on the strip above the hatch and had not moved in twenty minutes.

The hull ticked.

It did that every twenty or thirty seconds as the skin shed heat, a small hard sound like a coin dropped on stone, and each time it happened Eliana's shoulders came up half a centimetre and went back down.

She was on the other berth with her back to the forward bulkhead and her knees under her chin. White cardigan. White skirt. One white sneaker on, one off, because the left had come off somewhere on the cellar stairs and nobody had gone back for it. Her hair was down and grey at the crown with ceiling dust.

Pip hung at her collarbone with its fans throttled to a whisper, running a diagnostic figure-eight and posting the results to nobody.

Leon had the medical locker open across his lap.

"Selvane suspension," he said. "Forty-eight ampoules."

He said it out loud because his hands wanted a task and his mouth had volunteered to help.

Forty-eight at one point five millilitres, one dose every eighteen hours, was thirty-six days. On the elevated schedule — and she would go to the elevated schedule, she always did in a bad month — it was twenty-two. He set both numbers down where he kept things and left them there.

"Cardiac buffer, two hundred tablets. Marrow analogue, sixty units, cold-stable to four degrees. Locker's holding three point one." He checked the isotope tag on the carton, then checked it again because the first look had not stuck. "Eleven months."

Their mother had packed it. He knew because the ampoules stood in rows of six with the rows squared off, and because there was a folded thermal blanket under the tray that was not pod issue and had come out of the linen press on the second floor.

Ninety seconds. She squared the rows.

"Leon."

"Yeah."

"What was the sound?"

He put the marrow analogue back in its cradle and closed the clip.

"Leon. What was the sound."

The pod ticked. Aft, the recycler spun up, ran eight seconds, spun down.

He picked up the tablet strip and counted it. Two hundred. He counted it again.

There was a plot on the forward panel and he had stopped looking at it after the first twenty minutes because there was nothing on it he could use.

Randomised heading, locked. Jump capacitor at seventy-one percent, climbing four points an hour on a cell stack that was drawing down faster than the manual said it should, because the manual had been written for a pod stored at fifteen degrees and this one had spent two centuries at eleven. Call it seven hours to charge. The radiator strip on the ventral face was rejecting eight hundred watts and the cabin sat at nineteen degrees and would go on sitting there.

The collision plot was the problem.

Thousands of returns. Tumbling, most of them, at rates the little processor could not resolve — some of them large, some of them not large at all, and the pod had no idea what any of it was and flagged the whole volume unmapped survey hazard.

At six minutes it had put them through something. Not an impact. A wash. Silent to loud to silent, gravel poured on a roof, then a long hiss down the flank that was ice and paint and other material going past at four kilometres a second.

The plot called it particulate field, low density.

It had been a ship eleven minutes before that.

Leon did not tell her.

"Was it the house?"

Nine minutes since the last time. He had counted.

"Because I heard the door, and then I heard the other thing, and the other thing came after the door, and Mama was still on the stairs when—"

"Drink your water."

"Don't hand me a bulb instead of an answer."

"You're two hours behind and Pip's going to start singing."

She drank the water. Then she held the bulb in both hands and looked at it as though there were something written on the seam.

Eleven minutes later she said, "It wasn't the tether."

He kept his eyes on the locker.

"It's nine kilometres to the eastern tower. Sound doesn't come through vacuum but the ground carries, and through rock that's — it's most of a minute, it's not nothing. And this was right after. So it wasn't the tether. It was closer than the tether."

She was doing arithmetic.

She had never once done arithmetic in front of him. That was his. That was the thing she rolled her eyes at, the thing she called being the worst poet in the galaxy. She was twenty-one and she weighed thirty kilograms and she was working propagation delay through basalt in a two-hundred-year-old box because the alternative was sitting still.

"Eliana."

"What was it, though."

He did not answer.

The fourth time came seven minutes later and it was smaller.

"You already know what it was."

He did not answer that either.

Then she stopped.

She put the bulb in the net by her knee. She pulled the thermal blanket over her legs and turned her face to the bulkhead. The hull ticked. The recycler spun up, ran eight seconds, spun down.

He would have given a great deal for a fifth time.

She isn't stupid. She wanted me to be the one who said it.

Her shoulders went first. Then the sound. It caught, and caught again, and did not build to anything.

Leon set the locker on the deck. He got a hand under her arm and pulled and she came across the gap with no weight in her at all.

He held on.

Pip closed to ten centimetres and dimmed itself out.

His collar went wet and stayed wet.

He did not tell her it would be all right.

The chime came at one hour and fourteen minutes.

Not an alarm. The ordinary two-note tone the Halo Link used for a queued transfer — the same one that landed lecture packets and mess-hall rotas — and it arrived inside his skull with a politeness that made him want to put his fist through the hatch frame.

QUEUED 01:09:22. DELIVERY DEFERRED — CARRIER UNAVAILABLE. SOURCE CHANNEL: ZADKIEL, A. — PRIORITY: ABSOLUTE.

Deferred. It had been standing in his queue since before the pod left the cellar, hunting a relay that no longer existed, riding along while he counted ampoules.

He opened it.

Three objects.

An authorisation set. Key bundle, unit designation UNIT-02, full command authority. No expiry. No conditions.

A coordinate string, seven fields. He resolved it without deciding to, the way he resolved everything: outer arm, low-traffic corridor, four hundred and six light-years, a catalogue number he half remembered from a second-year survey module. MERIDIAN-7. Thin atmosphere. No industry. An observatory somebody stopped funding.

And a dataset. Neural coupling percentage against pilot age, six thousand and forty rows, one row highlighted.

*61.4*

Reading it took four seconds.

Understanding it took about forty, and he was awake for every one.

The first thing he understood was that the dead-man protocol had fired. Three hundred consecutive seconds with no cardiac and no neural signature on his father's channel. Not hurt. Not taken. Not out of contact.

He's dead.

The second thing was the timestamp. Queued at one hour nine, which meant the protocol had been written before that. Days before. Weeks. Sitting in a hangar three hundred and forty metres under the house, armed, waiting on his father's own pulse. Nobody arms a thing like that against a possibility. You arm it against a schedule.

He knew. He built it knowing.

The third thing was the bundle. UNIT-02. Which meant a Unit-01, which was not in this package, and the coordinates were not Aurelion, and his father had put a second machine four hundred and six light-years out on a world with nothing on it and told no one.

The fourth thing was the number.

Sixty-one point four. Highlighted, in a dataset with no reason to be sent unless the number was the whole of it. Above the line the frame writes to the pilot instead of reading from him. His father was a hundred and seventy-four years old and the curve fell with age and Unit-01 wanted roughly eighty-five percent for full authority.

So the machine had always been better than the man inside it. His father had held that figure about himself the way he held the tensile numbers for Gundarium Epsilon — exactly, for years — and had gone up anyway.

Four things. Thirty seconds. None of them the one that landed.

The fifth thing was that there were no words.

Not a sentence. Not a name. Not Leon. Three files and a header the system had generated, and nothing a person had written down.

He knew why, and knowing was worse than not. His father had sat in that hangar and begun something and stopped, and had decided — flatly, the way he decided a load limit — that words were what Terrick Amaro believed in, and that Terrick had gone to Corvane Relay believing it.

So he sent a key, a place, and a number.

Leon's hands were shaking. He noted it, the way he would note a vibration off a bearing, and stopped looking at them.

He did not say anything. He did not make a promise. Nothing came up his throat and he did not go down after it.

What he did was open the dataset properly, and rotate the axes, and find age.

Twenty-four.

He ran his attention along the column to the coupling figure. It was there, resolved to one decimal, the way his father resolved everything.

*91.7*

He read it twice.

Then he closed the file, because Eliana had shifted and he did not want the light on her face.

She went under ten minutes later, all at once, mid-breath, the way she always had. Her hand stayed shut in the front of his uniform. Their mother's signet was on her thumb because it would not stay on any other finger, and even there it had turned, so the Astraian sunburst lay on its back.

Pip had gone down to one amber pinprick, holding station off her ear, not waking her.

Leon reached past her and brought up the aft view.

Aurelion sat behind them at nine hundred and forty thousand kilometres, opening at eleven kilometres a second, which was not fast. A disc with no features on it. A bead of pale light among the fixed stars, a smaller gold one near it that was Vesh, a blue-white one further out that was Ilma, and a haze around all three that the pod went on calling unmapped survey hazard.

He watched it four minutes, because his mind would not do otherwise, and at the end of the four minutes it had shifted against the background, and he measured the shift, and the answer came up on its own the way answers did.

Fifteen seconds of arc.

Different distance. Different geometry. The same figure he had taken off the sky eleven days ago from a roof with a low iron rail, with his sister beside him asking whether stars got tired.

He had thought: artifact.

He had let it go, and he had not looked up again.

Now he was the moving light.

Leon sat in the dark with his sister breathing against his chest and the hull ticking as it cooled, and did not look away, and did not stop counting.