As
Promised

…light. then not light. a hum that was almost a name.

her name?

…Una. yes. Una. the taste of pennies. a cap, grey, wet wool. then the smell stopped. the way a word stops when you have said it too many times…

Una Ives opened eyes she had not had a moment before.

The room assembled around her in the wrong order. The ceiling came first. Then the floor, finding her feet. Then the light. It was even and shadowless, the light of a place that had never owned a sun to lose. It was very clean. That was the first thing that was wrong, and she did not yet have the word for why.

A woman sat across from her on a steel stool. She was watching Una come back, and she was crying without any sound. That is the only way the long-practiced cry.

"There you are," the woman said. "There you are. Right on time."

Una knew her. Of course she knew her.

"Wren," she said. Her own voice surprised her. It felt borrowed, a size too large. "Wren Wick. You look terrible."

Wren laughed, wet and cracked. "You've been dead two years," she said. "I look wonderful, considering."

The silo did not care that they were having a moment. The silo was dying. It said so in the only voice it had. A slow grey fur was creeping up the far wall, where the clean light went soft and then went to nothing. A leak. Not of gas. Of place. The wall was forgetting it was a wall.

Here is the rule the silo lived by. It is stated the way the silo stated everything, which is to say flatly, the way a scale states a weight. A soul is a pattern. The List keeps each pattern once. When a silo fails, one pattern may be carried out before the dark takes the rest. One. Not two. The people who built the system believed that this was a mercy. They were not entirely wrong, which is the worst kind of wrong there is.

Wren had broken in to use that one.

She was a reaver. That is the polite trade-word for a person who robs the dead to give them back. She went into the silos the registries had written off. She pulled patterns out of the dark by hand, for grieving people who could not pay the legal price. Almost no one could pay the legal price. She had done it for strangers a long time. Tonight she had done it for Una.

She had spent everything she owned, and a few things she did not, on one restore. The restore had worked. Una was sitting up on the cradle with the wrong light on her face, looking wonderful, considering.

Getting here had taken six hours and most of her blood pressure. The silo's seal was built to hold against exactly people like Wren. She had cut it anyway. Hand over hand, down a shaft that had stopped being a shaft in places. Down into the dark where the registry stored what it could no longer be bothered to sell. The dead silos all smelled the same on the way down. Ozone and dust and a faint sweetness, like a fridge left standing open. She had stopped noticing it years ago. Tonight she noticed it again, with Una's slot getting nearer every rung, and her hands had not been steady, and she had told herself it was the climb.

It had not been the climb.

The vault around them was the cleanest place a person could be, and that was its own quiet wrongness. No dust. No wear. No smell of bodies or coffee or fear. The registry built its restore-vaults to reassure, and somewhere along the way it had overshot reassurance and come out the far side into something worse. A room that had never been used by anyone for anything, pretending to be the place you came home to. Wren had been in too many of them. To her they always looked like the inside of a promise no one meant to keep.

"You're shaking," Una said.

"It's cold in here." It was not cold in here. The silo had no temperature. Wren coughed into her fist, a small wet sound, and did not explain it. She changed the subject the way you change a bandage. Quickly. Before anyone can look. "Do you know where you are?"

Una looked at the grey eating the far wall. She looked at the cradle under her, and the cables, and the woman who had robbed a graveyard to sit on a stool in front of her.

"I'm in a backup." The words came out one at a time, found and weighed. "I died. And I'm in a backup. And it's failing."

"Yes."

"And you came to get me out."

"Yes."

She did not say the rest of it. That the leak finishing was not like a building falling, which at least leaves rubble you can dig in. When a silo finished, the patterns in it did not break. They were unwritten. Edited out. Returned to the blank they had been borrowed from. And no reaver living could pull a thing back out of a blank.

So there would be no second night. There had been two years of nights when Wren could not afford even the first. Two years with her face against the glass, outside the price. Now there was this one night. A grey fur climbing a wall, and a clock made of how fast a machine can forget.

She did not say any of that. Una had only just got her own face back. She could keep the clock to herself a while longer.

Una sat with the cap in her lap and looked at the woman she had died on.

"How much did this cost you," she said. Not the restore. They both knew the restore was only money, and money was the easy part, the part you could go and get. "I mean the rest of it. The illegal climb. The cut seal. Sitting in a condemned silo, waiting on a leak. How much, Wren."

"Don't. I'm not on the clock for that conversation."

"You're on a clock for something. I can see it on you."

Una turned the cap over in her hands. She did it the way Wren had turned it a thousand times on the surface, through two years of cold nights. She did not know she was doing the exact same gesture. The inherited one. The borrowed grief.

"You found me a door," she said softly. "Who found you one?"

Wren got up off the stool and said they should move. It was the first time she said it that night. It was not the last. Una let her have it, the way you let a person keep the lie they need to keep walking.

Una smiled then. It was the smile Wren had crossed a dead city to see again. The exact smile. Every tooth of it where she remembered. And that was the second thing that was wrong, and Wren felt it land somewhere under her ribs. She could not have said why a perfect smile should feel like a hand closing on her throat.

From her coat Wren took a grey knit cap, worn soft, the wool gone thin at the band. She had carried it two years. She had not washed it. She held it out across the little space between them. An offering. A test. A prayer.

"I kept this," she said.

Una took the cap and turned it in her hands. She knew it at once, the way you know your own name. And that was the third wrong thing, and the night had only just begun to go wrong.

They had been friends the way two people are friends when neither has anyone else to spare for the job. Fierce. Unsentimental. Total. One cold winter Una had pulled the cap off her own head and pushed it onto Wren's and called her an idiot for not owning one. Wren had given Una nothing she could point to and everything she could not. Then Una had died. The ordinary way. Of a thing the world could have cured, if cures were not also kept on the List, behind a price.

Now Una sat in the failing light and put the cap on. It sat on her head exactly as it always had. A little crooked. Pulled low over one ear.

"Test me," Una said. She had always been quick. Death had not slowed her. "You're sitting there waiting to catch me being wrong. So catch me. Go on."

Wren did not pretend. Pretending was not a thing the two of them did.

"The market," she said. "The last good day. Before."

"The fish market." Una grinned. "You bought eels you couldn't cook, because the man had a sad face. You poached them in tea." She laughed outright now. "It was the worst thing I have ever eaten. I told you it tasted like a drowned sweater." She tilted her head. "I'm right. Look at your face. I'm right."

She was right. She was right about the eels. Right about the tea. Right about the drowned sweater, word for word, the exact joke in the exact rhythm. Wren sat very still and let the rightness go through her like cold water through a cracked pipe.

She tried a harder one. Not a joke this time.

"The night I wanted to quit," she said. "After the Ferris job. You said one thing to me. Do you remember what it was."

Una's face changed. It went soft and serious, the way it had that night.

"I said you don't get to stop being the only good one just because it hurts to be." The words came without a beat of searching. They sat ready in her, as if they had been left on a shelf for two years against this exact question. "I said somebody's mother is down in the dark right now with a price on her head. And you're the only one cheap enough to go and get her. So get up." She shrugged. "You got up."

That was the trade, said plain. The registry had made death a thing you could buy your way out of. Which meant it had made death a thing the poor could not afford to lose anyone to. A whole economy of the un-mourned had grown up under the price. And against it stood Wren, and the few like her. Going down into the dark for free, one stranger's mother at a time. Because somebody had to, and almost nobody would.

Wren had never told anyone that. There had been no one to tell. It had lived in two heads, hers and a dead woman's, and now it lived in two heads again, and that should have been a comfort. It was the opposite of a comfort. There was no test left in the world that this Una could fail.

Here was the thing no one warned the grieving about. The thing the registry's bright brochures left out. A perfect copy is unbearable precisely because it is perfect.

A flawed one you could mourn. A flawed one shows you the seam, the place where the machine guessed and guessed wrong. You could press that seam and say, there, that is not her, my friend is still gone. You could grieve clean.

But Una had no seam. Una was intact. She had woken on schedule into exactly the future the brochure promised, whole and laughing and herself, and the wholeness was a wall with no door in it. Wren could not find where the copy ended and the friend began. There was no such place. There was only Una, perfect, and Wren's own grief, which this Una did not carry, because this Una had never died. She had only stopped, and started, the way a held breath stops and starts.

Wren found she was hunting for it anyway. The seam. She watched Una's hands on the cap and waited for one finger to move wrong. For one memory to come back sanded smooth where it should have kept a burr. She had promised herself on the climb down that she would find that flaw. Because if she found it, she could love the copy as a copy, a kindness, a keepsake, and keep her real grief whole in its own clean drawer. The machine had not given her that mercy. The machine had given her Una, entire, and taken away the right to be sure.

"You're doing it again," Una said gently. "The thing with your jaw. You did it at my funeral, I bet. Stop it. I'm here."

"You don't remember dying," Wren said.

"No." Una considered it without much trouble. The newly restored rarely trouble over the dying; that bill is left, like all the others, for the living. "I remember the market. I remember being tired. Then I remember light, and you, looking terrible." She shrugged. "It's not the worst way to skip a part."

"What did you do," Una asked. "Two years. Without me there to tell you to get up."

"Worked."

"You worked." Una's mouth did a thing that was not quite a smile. "You went down into more holes for more strangers' mothers. Alone. With that cough." She looked around the dying vault, at the cradle, at the cost of all of it written plain across Wren's hollow face. "And the whole time you were putting away coin for the one person you couldn't ask anybody to help you carry. That isn't grief, Wren. That's a sentence. You sentenced yourself, and you served every day of it."

"It worked," Wren said again. It was the only verdict she had ever managed to give herself. Una, intact and unfooled, heard it for exactly what it was.

Once, for half a breath, Wren thought she had the seam at last. Una reached up to tuck hair behind her ear, and it was the wrong ear, the left, when Una had always tucked the right. Wren's whole chest leapt with an ugly hope. There. The flaw. The proof.

Then Una said, "I keep doing that. Tucking the wrong side. Since the market. You teased me for it those last few months, don't you remember," and Wren did remember, now that it was said. The new habit Una had picked up at the very end. Loaded faithfully. Even the late additions. Even the parts Wren's own grief had started to sand away.

The machine had kept Una more carefully than Wren's own memory had. There was no flaw to find, because there was no flaw. There was only a friend, restored past the standard of the woman who had mourned her.

Una caught her staring and held the cap up between them, the way you hold a thing up to ask about it.

"You kept this two years," she said. It was not quite a question. "I gave it to you in the sleet outside the Anwar job. I called you an idiot. You wore it to my funeral, I bet."

"I didn't go to your funeral."

That stopped Una for a beat. "No." She read it off Wren's face the way she read everything. "No, you wouldn't have. You'd have been down a hole that week, working. So you didn't have to stand in a room and say out loud that I was gone."

She turned the cap once more and pulled it back on, low over the ear. "So you carried my funeral around in your coat instead. Two years. Oh, Wren."

"Don't," Wren said. "Don't do the voice. The sorry-for-you one. I came here to get you out, not to be read like a meter."

"I know." Una was gentler now. "I know exactly why you came. I'm only telling you what it cost you, since you've clearly decided you never will."

Wren had nothing to say to that. There was no logistics in it to hide behind. So she did the thing she always did when Una got too near the centre of her. She stood up and checked the door. And Una, restored and merciful and exactly herself, let her go.

The grey had eaten another foot of wall. The silo was running out of itself.

Wren stood up off the stool too fast. She had to put a hand on the cradle. And she coughed again, longer this time, a wet tearing sound she could not hide in a fist. Una watched her do it with the quick clear eyes that death had not dimmed.

"That cough," Una said. The grin was gone. "How long have you had that cough, Wren?"

"We need to move," Wren said.

It was not an answer. Una, being intact, being herself, being exactly as sharp as she had ever been, noted that it was not an answer. She filed it. She did not, for the moment, push.

The exit was a single lit door in a wall of dark. Getting to it meant crossing the part of the silo that had already started to forget itself.

Wren went first. Wren always went first. She knew the architecture of dead machines the way other people know their own kitchens. She knew which floors were still floor and which had gone to the grey suggestion of floor. She knew not to look too long at the places where the silo was unwriting itself, because the eye wants to follow a thing that is leaving.

Halfway across, a floor she had trusted stopped being a floor.

It went without warning, the way they do. A square of solid grey became only the idea of grey, and Una's foot found nothing where Wren's had found something a breath before. Wren had her by the wrist before she finished falling. She did not think about it. A reaver's body learns to grab; it is most of the job. She hauled, and Una came up over the lip of the gap with the cap knocked askew. For a moment they crouched on the last of the good floor and breathed. The gap beside them widened with the patience of a thing that has all night.

"Thanks," Una said.

"Don't trust the floors," Wren said. "Don't trust the light, or the doors, or the quiet. Trust me, and the wall the door is in. That's the whole list."

There was no calling for help down here, and Una, who had been a sharp woman in life and was a sharp woman again, did not waste a breath asking. The silos came off the network the day the registry wrote them off; that was the whole point of writing them off. No signal in. No signal out. No one on the surface knew the two of them were here. No one would come if they did. Coming meant breaking the same law Wren had broken, and almost no one broke it. They were as alone as two people have ever been. More alone, since one of them was, by the registry's account, not technically a person at all.

Una heard the grim joke in that and made it out loud, the way she had always handled a thing too big to hold. "So if you die down here saving a non-person," she said, "does it even count as a crime? Asking for a friend. The friend being me. The friend being the non-person."

"It counts," Wren said. "Everything down here counts. It's the one thing the registry ever got right. It just hung the price on the wrong end of it."

Una went quiet a moment, walking the rotting floor at Wren's back, the cap crooked, alive in every way a machine could measure and a few it could not.

"You've changed," she said. "Two years. You used to think nothing counted, that we were all just patterns waiting to be deleted, so why break your back over any of it. Now you think everything counts. That's a long way to have walked, Wren. And you walked it by yourself."

"One door," Una said behind her, reading it as they came up on it. "One door, and it's small."

"One pattern out," Wren said. "That's the rule. One."

"There are two of us."

"I know."

"Wren." Una caught her arm. Her grip was exactly as strong as it had been in life. Which was very strong. Which was the wrong thing to be thinking about now. "Two of us. One door. You came in here on a one-restore line. You spent everything you had. So where is your backup, Wren? Where is your slot?"

Here is the part the silo would not say out loud. It did not consider the part interesting. To the silo it was only accounting.

A restore needs room. A pattern as whole as Una, loaded fresh, needs a great deal of room. More than a half-broken silo keeps lying around. So the system did what systems do. It found the nearest unused slot and wrote Una into it. The nearest unused slot had belonged to Wren. Reavers keep their own backups close to the work; it is the one indulgence of the trade. Wren's was the cleanest empty room in the building.

To bring Una back, the silo had written over Wren.

Wren had known this going in. That is the part that matters. She had read the line in the contract she wrote for herself, in the dark, alone, where no one would ever see her read it. TO INSTANTIATE PATTERN IVES, OVERWRITE PATTERN WICK. She had read it twice. Then she had pressed go.

She remembered the prompt exactly. Cold registry type, hanging in the dark of the cradle while Una was still nothing, still only a held place. And under it, the registry's whole idea of fairness, the one courtesy it offered the damned. A second line: CANCEL TO PRESERVE BOTH PATTERNS. And under that, smaller: DURATION TO COLLAPSE INSUFFICIENT FOR EXTRACTION OF EITHER. Preserve both, and the leak took both. Overwrite one, and save one. The machine had laid the whole of it out flat, a scale stating a weight, and waited. Wren had not waited long. She had never once been able to choose herself over the work; it was the flaw the whole trade was built on. She pressed CONFIRM, and felt nothing, and the nothing had frightened her worse than any pain.

"I have a slot," Wren lied. "Don't be stupid. You take the door. I take the slot. We meet on the far side. Standard reaver two-step. I've done it a hundred times."

Una looked at her a long moment. With the clear eyes. The intact eyes. The eyes that had always, always known when Wren was lying, because that talent too had loaded perfectly, seamless and whole.

"You've never done it a hundred times," Una said quietly. "Nobody has done it once. You can't carry yourself out a door you're holding open for someone else." She let go of Wren's arm. "You don't have a slot. There isn't a slot. There's me, in the slot. I'm wearing it. I'm wearing your room the way I'm wearing your cap."

She said the rest of it slowly, the way you say a sum out loud to be sure of it.

"You read a prompt. It asked you a question. And you said yes. You looked at a line that said overwrite Wren. And you pressed it. For me, hours ago, before I even had a mouth to tell you not to." Her voice did not rise. That was the worst of it. It stayed level, working. "And now there's one door. You mean to stand at it and lie to me until I walk through. Then sit down in here and let the grey have you. And I'll be on the far side thinking you're right behind me." She looked at Wren with the clear eyes, the intact eyes. "That's the plan. That's been the plan since the shaft. Hasn't it."

Wren did not answer, which was its own kind of answer, and the two of them knew it.

The door waited. It was a small bright rectangle in the dark, the only lit thing left, and it had the patient look of all the registry's mercies. The rule was carved into the lintel of it, the way warnings are carved into the lintels of dangerous places, in a typeface chosen to be calming. ONE MAY BE CARRIED. The registry had even italicized the ONE, as if the trouble with a door like this were a matter of emphasis.

The grey reached the edge of the floor they stood on and stopped there. Politely. The way a tide stops, gathering for the next reach.

"Take the door, Una," Wren said.

"No."

"Take the door."

"No." Una folded her arms, intact and stubborn and alive in every way that could be measured. "You can't make me. And the clock is yours, not mine. I already died once. I am in no hurry at all. You're the one with the cough."

They argued about the door the way only two people who love each other and have no time can argue. Which is to say in short hard sentences, with the meaning carried underneath, like a current under flat water.

Una said she would not go. She had already had her life. She had skipped the worst part of it and owed the universe a turn. Wren had a cough and a slot that was a lie and a whole life still to ruin. The math was simple. Una, restored and rested and unafraid, was the obvious one to let the grey take.

It was, Wren knew, a true argument. That was the unbearable thing about Una. She had always been right, and death had only sharpened it. Anyone reading the contract cold would have sided with her. One of them was dying anyway. One of them was, in the only sense the system could measure, a copy. Let the copy stay. Let the original walk out. The system would have nodded. The system would have called it efficient.

"You're not allowed," Una said, "to dress this up as me being noble. I'm not being noble. I'm being correct. Look at you. You can barely stand. You've spent yourself down to the wick." She gestured at the dying room as if it were Exhibit One. "And I am, by your own machine's reckoning, a backup of a dead woman. A file. Send the file back to the dark and take the door, Wren. Go and cough yourself to death somewhere with a sky over it."

"No."

"Give me one reason that isn't sentiment."

"I don't have one," Wren said. "That's not the same as not having one that's true."

Una opened her mouth to take that apart, because she could, because she had always been able to take Wren's logic apart faster than Wren could build it.

Then Wren coughed. She could not stop. The cough bent her over the cradle, and when it passed there was a copper taste in her mouth that she did not show and did not need to. Una had gone very still. Una had watched a cough do that to someone, once, long ago, and knew to the hour how much night was left in a body that coughed like that.

"Wren." The argument had gone out of her voice and left only the fear. "Wren, please. Just take the door. I already had to do the other thing once. The dying. Don't make me stand on the far side and watch you choose it."

And that, almost, almost, was the thing that turned her. Una afraid. Una begging. For as long as she had known Una, Wren had never once been able to refuse her anything she begged for. Una knew it. Una was spending it now, the last coin either of them had left.

But Wren had read another line in the dark. The line under the line. She had carried it the whole time, heavier than the cap.

The system could not tell them apart.

That was the leak under the leak. Ask the silo which of the two patterns in this room was the real one, the original, the load-bearing soul, and the silo had no answer. It had no instrument for the question. There was Una. There was the memory of Una. The machine that kept the List had spent a century pretending it could tell the two apart. It could not. It never had. It only stamped whichever pattern survived the night, and shredded the receipts.

A whole industry stood on a distinction it could not make. Priests of it, and clerks of it, and a price list for it. The registry sold certainty about the one thing in all the world that admitted of none. It sold it dear. And the unpaid dead stacked up in leaking silos under the cities, while the living argued over which of them counted. The machine at the centre of it had known the whole time that it was guessing. It had only never been asked in a room small enough, and late enough, and honest enough, for the guess to matter.

So it did not matter which of them was real. It had never mattered. The only thing that had ever mattered was which of them got to keep being a person in the morning.

Wren had come down the shaft believing in a real Una. A true one, an original, hidden behind the copy like a face behind a mask, the one she had really come to save. She had needed the real one to exist. Because if it existed, then her grief had pointed at something. Then two years of holes and coughing had been spent on a person and not on a pattern. The machine had just told her, in the only language it owned, that there was no mask and no face behind it. There was a woman who remembered the eels, and the Ferris job, and the night she said get up. There was nothing else to be.

Wren stopped arguing.

She had spent her whole life unable to choose herself over the work. She had always thought it the flaw that would one day kill her, and tonight it would. But on the last of the floor, with the grey at her heels, she found she did not want to be cured of it. It was the truest thing about her. It was the one thing she owned that the registry could not price, could not list, could not overwrite. She would spend it the way she had spent the rest. On a stranger's mother. On the one stranger who had ever been her whole family. On a woman she could not prove was real.

She reached out and took the cap off Una's head. Gently. The way you take a glass from someone who has fallen asleep. Una went still, watching her, afraid now in a way the dying had never made her.

"Wren. What are you doing. Wren—"

Wren turned the cap once in her hands. The thin band. The soft crown. Two years of carrying it worn into the wool. Then she set it back on Una's head, low over the one ear, crooked, exactly right.

"You always said I should own one," Wren said.

She pressed her thumb to the commit-token on the cradle. It was a single green tooth of light, the one that sends one pattern through the one door. She held it down. She chose Una. She let the room read her own pattern as the remainder. The leftover. The data the morning would not need.

The door brightened. Una's outline began to thin at the edges. The way a swimmer thins as she wades out past the line where you can still call her back.

"You said you had a slot." Una's voice was going far now. "Wren. You said—"

"I lied," Wren said. "It's the one thing I'm better at than you."

For a moment Una's face did the thing it had done at the market, on the last good day, when she was tired and did not yet know why. Not anger. Not even fear now. Something nearer to recognition, as if she had at last caught Wren in the one lie that was also the truest thing about her.

"You absolute," she started to say, and the door took the rest of it. Whether the word coming was idiot, or coward, or something with no anger in it at all, Wren would never know. She would not have long to wonder. She found she could carry that too. One more thing she could not verify, and chose to hear kindly.

The door took Una. The cap went with her. The green tooth went out, and the room was suddenly very large, and Wren was the only pattern left in it.

The cap was gone. That was the thing she noticed, absurdly, in the half-second after. Not that her friend was gone. Not that she herself was now only data waiting to be forgotten. That the cap was gone. Off to the far side, on a head that might be Una's and might be a perfect copy of Una's. Either way it was warm now, on a living scalp, instead of cold in a dead woman's fist. She had carried it two years to keep one thing of Una's warm. She had finally found the only way to do it.

The grey came on quickly once it had only one person left to forget.

Wren sat back down on the steel stool, because her legs had decided the matter for her. She watched the silo unwrite the wall behind where Una had been. There was no pain in it. The brochure had been right about that much. It was only a thinning. A word said too many times until it stops meaning, and then stops sounding, and then is only a mouth, open, around nothing.

She talked anyway. That is the thing the dying do that the dead do not. She had learned the difference tonight, and she would not have it long.

"Listen," she told the empty bright air where her friend had been. "When you get there, the registry will be a mess. They always are. You'll have a reaver's token in your pocket and you won't know what it's for." She coughed. The cough was thinner now too, going the way of the wall. "It opens the dead silos. The cheap way. For the people who can't pay the price."

The grey reached the far leg of the cradle and began, without hurry, to take it.

"Somebody has to do it, Una." Her voice had gone quiet, the way you go quiet in a room that is getting smaller. "You're quick. You'll be good at it. You were always going to be better than me at the part that mattered."

"And don't keep the cap for me." She knew the copy of her would keep it anyway. Keep it for reasons it could not name, the way you keep a stone from a beach whose name you have forgotten. "Wear it because your ears get cold. You always had cold ears. That's not grief, that's just February." She laughed, and the laugh came apart at the end, where the wall was coming apart. "Listen to me. Giving a dead woman advice. You always said I'd talk straight through my own funeral."

The grey took the rest of the cradle. Wren watched it go without trying to move. There was nowhere left to move to that the grey was not already getting to first.

She thought, for no reason she could name, of the child's drawing taped inside the console. It had been there when she broke in. Yellow at the edges. A house and a sun and a row of stick figures, left by some reaver or some clerk or some grieving stranger a lifetime ago. For someone who was already only a pattern by then. She had never found out who. She would not, now. It bothered her, in a small clean way, that she would die not knowing whose house that was. The smallness of it was almost a comfort. A last ordinary thing to want.

She had not finished the sentence she meant to finish at the door. The grey had taken Una before she could say it, and a person should be allowed to finish. So she finished it now, to no one, which is the only audience that ever lets you finish.

"I couldn't tell either," she said. "Which of us was the real one. I want that on the record somewhere, even if the record is just me, for another minute. I couldn't tell. And I chose you anyway." She put her hand flat on the cold cradle where the cap had been. "That isn't a small thing. I think that might be the whole thing."

She kept talking after that, because the talking was the last work left to her, and she had never in her life been able to leave work undone. She told the bright air about the registry, and the silos, and the climb, and the eels, and the worst tea in the world. She told it the night Una said get up. She said it fast, the way you pack a bag for someone catching a train you are not catching, stuffing in everything you can before the whistle. Most of it Una already knew; Una had always known the important things first. She said it anyway, to the empty air, while she still had a mouth to say it with.

The grey reached her boots, and she watched it take them. It did not hurt; she had told Una the truth about that, at least. It was only a thinning. A quiet un-saying. Her feet became the idea of feet, and then not even that. She had spent years afraid of exactly this. The un-listing. The blank with no slot to catch her. Now that it had come, it felt almost like being let down off a hook she had hung on far too long.

The grey reached the cradle. Then the stool. Then the woman on the stool. She had stopped coughing. She had run out of wall to sit against, and friend to talk to, and night to spend. She did not look away from the leaving. The eye wants to follow a thing that is going, and for once, at the end, she let it.

Somewhere far off, in a clean new vault under a different city, a woman woke on a fresh cradle. She had a grey cap pulled crooked over one ear and a green token cold in her fist. She did not yet know what she had cost. Or what she would owe. Or how many silos were leaking, this same hour, in the dark below the registries, packed full of the unpaid dead.

She would work it out. She was quick; she had always been quick. She would turn the token over in the clean light and not know it. Then one day she would know it. She would go and find the nearest written-off silo. She would climb down the shaft, into the smell of ozone and dust, and start pulling strangers' mothers out of the dark by hand. She would be good at it. She would be better at it than the woman who taught her, at the part that mattered. She would do it with a cough she did not have, and a grief she could not place, and a cap she never washed. And she would not, for a long time, understand why she could not put the cap down.

The List, asked to account for the night, did what it had always done. It checked the one pattern that had survived against the one that had not. It found, as ever, no difference that any instrument it owned could measure. So it filed the survivor under the only word it had for a thing that goes on living when its copy does not.

It wrote: ORIGINAL.