The report went in at 11:58 on Tuesday morning, two minutes ahead of the deadline, and nothing happened.

That was the strange part. Elias had half expected an alarm to sound. He had pictured a flurry of footsteps on the stairs, a telephone ringing, Rourke's polished voice demanding an explanation for the missing line. He had not slept, and he had eaten nothing since a cup of tea at dawn, and the whole morning had taken on the thin, glassy quality of a dream in which one is waiting for something terrible to be announced. But he pressed the key, and the screen displayed a small green check, and the lab hummed on around him exactly as before.

At twelve-fifteen, an automated receipt arrived in his inbox. At twelve-forty, a single line from the deputy commissioner's office, copied to the Behavioral Analysis Unit: Received with thanks. Appreciate your adherence to protocol.

He read it twice. Then he put his head down on his folded arms for a moment, among the steel and the silence, and did not lift it for a long while.

The day went by in pieces. Wade came and went, and brought him a sandwich that he did not eat. A young resident from the university hospital arrived for an observation shift, trailing nervousness like a cloud, and asked eleven questions about the cooling schedule for the cadavers, and Elias answered each of them in a flat, courteous voice that seemed to belong to a stranger. A man from the state toxicology lab called about the Kray samples and was told they had already been shipped. At four o'clock a package arrived for Halloran, and Elias signed for it and set it unopened on the old man's empty desk, and stood there for a minute in the quiet office with the shelves half bare, listening to the sound of his own breathing.

By nine he was alone again. By eleven he had cleaned the whole lab twice. At a quarter to midnight, with nothing left to scrub, he began to rearrange the specimen shelves.

It was a pointless task. He knew that. The jars were already sorted by case number and date of collection, the labels turned outward, the lids snug, the whole array as neat as a row of books in a library. But there was a particular comfort in lifting each one, reading its label, and setting it down again precisely a quarter inch to the left. His fingers moved by themselves. His mind went elsewhere.

It went to a white stage in warm amber light. A man in a dinner jacket, bowing his head.

It went to a gray block on a calendar.

It went, as it always did now, to the thing he had not let himself think about directly, which was that he had been sitting at his desk for sixteen hours, and had spent perhaps fourteen of them listening for footsteps in the corridor.

He did not know when he had started doing it. It was not a decision. It was a thing his body did, the way an animal at the edge of a clearing will turn one ear toward the dark. A door opened on the upper floor. A pipe knocked. A cart rattled past in the hall, and his hand would tighten on whatever he was holding, and his breath would catch, and then it would be nothing. A janitor. A porter. Wade, going home.

He was setting down a jar of formalin when he heard the step.

It was slow and even and unhurried. It came from the far end of the basement corridor, past the elevator, past the supply closet, past the door to the cold room. It was a tread he would have known anywhere. He had learned it without wanting to, the way one learns the sound of one's own front door.

He did not turn around. He placed the jar on the shelf, adjusted its label by a quarter inch, and drew a long breath.

The footsteps stopped.

"Doctor."

It was just past ten minutes after midnight. He did not need to look at the clock above the sink to know it. He turned slowly, and wiped his gloved hands on a clean towel, and met the dark eyes in the doorway.

Luke stood on the threshold, exactly where he had stood the last time, with the toes of his black shoes at the edge of the tile and his back square to the corridor. He wore a charcoal suit with the tie loosened and the jacket unbuttoned, and there were shadows under his eyes that had not been there that morning. He had a large paper bag in one hand, folded over at the top. The faint sweet smell of broth rose from it.

"I saw your light on," he said.

Elias felt the words land.

It was a perfectly ordinary thing to say. A man walking down a corridor sees a strip of yellow under a door, and mentions it. But he had said it on a night in October, in a dark lab, to a room he had believed to be empty, and the same five words had come to Elias out of the shadows like a hand reaching out of the water. He heard them again, in a different voice, in a different hour. I saw your light on. I thought you might want this.

"There are no windows on the corridor side," he said, evenly. "The only light visible from the hall is the strip under the door."

"Yes." Luke inclined his head. "I am afraid I have a habit of noticing strips."

"It is nearly midnight."

"It is a little past." The corner of his mouth moved. "I have been with the deputy commissioner since nine. He has opinions about press management. I thought you might not have eaten, and that you would not have told anyone if you had not."

"I have eaten."

"What have you eaten?"

Elias said nothing.

"Wade left a note on the break-room refrigerator," Luke said gently. "It said that he had put a sandwich on your desk at one, that you had not touched it by four, and that he was very worried and would I please do something. I am not the sort of man who can do something about a sandwich." He lifted the paper bag slightly. "But I know a woman who makes soup."

It was so perfectly judged that Elias could have laughed. It was light and humble and oddly funny, and it carried with it, folded small and tucked under the joke, a quiet, steady, unmistakable concern. He was aware, once more, of the faint dangerous warmth that came off this man like heat off a stove. He kept his hands flat against the cool steel of the counter behind him.

"May I leave it?" Luke asked. "I will not come in. I would not."

Elias looked at the bag.

There was a counter inside the door, a low steel cabinet where the technicians left their clipboards and their coffee. It stood perhaps a foot from the frame. A man standing on the threshold could have reached it with an extended arm, if he did not mind stretching. He could set something down on it and withdraw without ever crossing the line.

"You may put it there," Elias said.

Luke leaned in. He did it with great care, one hand braced on the doorjamb, his body angled so that his toes never left the edge of the tile, and he set the bag on the counter and withdrew his arm in a single smooth motion. The paper rustled. The smell of chicken and ginger and warm bread rose into the clean cold air of the lab like something shy.

He straightened. He did not retreat.

Neither of them spoke. The refrigeration units breathed. Somewhere above them a pipe ticked as it cooled.

"I have been thinking about your report," said Luke.

His tone had not changed. It was conversational, mild, a man making small talk at the end of a long day. But Elias heard it shift, very slightly, the way the surface of a pond shifts when something moves beneath it.

"It was submitted this morning."

"I have read it." He folded his hands in front of him. "Twice. It is a very fine piece of work."

"Thank you."

"People say," said Luke, "that the dead will tell the truth, if one is patient enough to listen." He was not looking at Elias. He was looking at the long gleaming rows of tables, the covered instruments, the pale light on the steel. "My mother says it of the saints. I have always found it a comforting idea, though I am not sure I believe it. It seems to me that the dead tell us only what the living are prepared to hear."

"That is a very philosophical position, Captain."

"I come by it honestly. I have attended a great many funerals." His eyes came back. They were steady and dark, and entirely unreadable. "Do they tell you things, Doctor? Things you do not put in the report?"

The silence that followed was so absolute that Elias could hear the blood in his ears.

He had expected something. He had known for days that this conversation was coming, somewhere in the dim future, as one knows that a stairway ends. He had rehearsed it in the shower and on the bus. He had prepared four answers. But nothing he had prepared had accounted for the quietness of it, or the lightness, or the gentle, courteous way in which the question was set down between them, like a cup on a table.

"They tell me what the body can say," he said.

"That is not an answer."

"It is the only one that will survive cross-examination."

Luke smiled.

It was a small thing, a faint crease at the corner of the mouth, and it was gone almost before it was there. But there was a quality in it that Elias had not seen before. Not warmth. Not humor, exactly. It was the look of a man who has been handed a card face-down and has decided, with admirable composure, not to turn it over.

"A fair point," Luke said. "I withdraw the question."

"You do not have to."

"I think I do." He shifted his weight. "I would like to ask another, if you will permit me. A smaller one."

"Please."

"Dr. Halloran's reports on the first four victims each included an estimate of the assailant's height. A range, you understand. Five-ten to six-three. A pathologist's best guess, offered with all the proper caveats." He paused. "I have always found them useful. They narrow things down. Yours does not include one."

Elias did not move. His hands lay flat against the steel behind him, and he felt the cold of it go up through the leather and the nitrile and the cotton, all the way to the bone.

"It was not included in the instructions," he said.

"I beg your pardon?"

"The deputy commissioner's office issued a memorandum on Monday morning." His own voice sounded far away, level and dry. "All pathology reports in the investigation were to be confined to cause and manner of death, and to omit any characterization of the perpetrator. That is the province of the Behavioral Analysis Unit. I followed protocol."

"Yes." Luke nodded slowly. "I saw the memorandum. Rourke circulated it to the entire task force."

"Then you understand."

"I understand perfectly." There was nothing in his face at all. "It was a very sensible instruction."

He said it so evenly that the words seemed to hang in the air, round and smooth and perfectly polished, and underneath them Elias heard a faint, dry note, like paper tearing very far away.

He thought: he knows.

He thought: he does not know.

He thought: it does not matter, because I cannot tell the difference.

"You disagree?" he heard himself say.

"I did not say that."

"You implied it."

"I implied nothing." Luke's eyes were gentle. "I observed that it was sensible. I have always admired people who know what to leave out. It seems to me a rare and difficult skill. It must take a great deal of discipline." He paused, and let the quiet stretch, and said softly, "I imagine it must be a heavy thing to carry."

The words dropped into the lab like stones into a well.

Elias could not tell what they meant. They might have been compassion. They might have been a warning. They might have been nothing at all, the idle, kindly, clumsy observation of an exhausted man at the end of a long night. He had spent twelve years learning to read what people's faces said when their mouths were closed, and he stood in the humming dark with every faculty he possessed trained on the man in the doorway, and found nothing. A blank. A beautifully polished surface.

Nothing at all.

"I leave out nothing that I can defend," he said, very quietly.

"Of course not."

"That is the only standard I have."

"It is an excellent one." Luke inclined his head. "I would not wish you to hold yourself to any other."

They looked at each other.

It lasted perhaps five seconds. It felt, to Elias, much longer. It was the sort of silence that occurs between two people who have both just heard something that neither will mention, and who both know that the other has heard it. There was a thin, bright current running between them, strung tight across the cold air of the lab. It hummed. He could have sworn he felt it in his teeth.

Neither of them touched it.

That was the thing. They stood on either side of a line of linoleum, three paces apart, and each of them knew perfectly well what the other was concealing. And each, with a courtesy so exact it was almost tender, declined to ask.

It was the most intimate thing Elias had ever experienced. It frightened him far more than the pier.

"Well," said Luke at last, and the spell broke, and the lab was merely a room again. "I have kept you long enough. Eat the soup, Doctor. It will do you more good than I can."

"Captain."

"Yes?"

He had not planned to speak. He had only wanted, for a moment, to fill the silence with something, anything, so that the other man would not simply turn and go. "Thank you," he said. "For the soup."

Luke looked at him for a long moment, and something very faint and unguarded moved through his face and was gone.

"You are welcome," he said. "Good night, Elias."

He stepped back from the threshold, and turned, and his footsteps went away down the corridor, slow and soft and perfectly even, until the elevator chimed and the doors closed and there was nothing left but the hum.

Elias did not move.

He stood where he was for a long time, with his back against the steel and his gloved hands pressed flat on either side of him. The paper bag sat on the counter, ten feet away, with a tiny curl of steam rising from its folded top. He looked at it. He did not go near it.

He went to the sink instead, and washed his hands. Three minutes. He dried each finger. He walked to the specimen shelves and began to move the jars again, one at a time, a quarter inch to the left, and did that for twenty minutes, until his mind went quiet and blank.

Then he walked the length of the lab. He checked the refrigeration gauges. He checked the lock on the cold room, and the drains, and the instruments in their sterile trays. He checked the clock, and the date on the wall calendar, and the expiry dates on the reagents in the cabinet. He went around the room three times, the way a man circles a fire he does not intend to approach, and by the end of the third circuit he had run out of things to check.

It was a quarter to one. The soup was still on the counter.

He told himself it would be cold by now.

He told himself that he was not hungry, and that he had no use for an act of kindness from a man who had done what this man had done, and that he would pour the whole thing down the drain in the morning. He thought of Frank Lowry's widow, baking bread at four in the morning because she could not sleep. He thought of the words I would rather have one man who reads than five who assume. He thought of a plain white card, and a number, and a voice saying any hour.

He was so tired.

He crossed the room. He took the bag in both hands, and it was still warm, and he stood holding it with the whole length of the dark lab behind him and the silence pressing in on every side.

There was a plastic container inside, round and heavy, the lid fastened with two small clips. He undid them. Steam rose in a pale cloud, fragrant and gentle. It was chicken soup, thin and golden, with rice and a little ginger and a scatter of green. Beneath it, wrapped in foil, were two slices of toast, still crisp at the edges. And tucked into the corner of the bag, folded very small, a paper napkin and a plastic spoon.

He had not had a hot meal in nine days.

He knew exactly how long. He had counted. It was one of the things he counted, in the dark, when the others ran out.

He did not sit down. He could not have said why. He stood at the counter in the dim light of the lab, with the overhead panels off and only the green lamp burning at the far end, and ate the soup with the plastic spoon, slowly, standing up, the way a thief eats in a stranger's kitchen. It was good. It was very good. It tasted of ginger and salt and warmth, and it went down into his stomach and spread outward, little by little, into the long cold hollows of his chest.

He ate every drop. He ate the toast. He folded the foil into a neat small square and the napkin into a neat smaller one, and put them in the bin, and stood with his hands on the edge of the counter and his head bowed.

It was not forgiveness. He told himself that very firmly. It was not kindness, either, or trust, or anything so large. It was only hunger, and a long dark night, and a small round container that had been left on a counter by a man who had stayed behind the line.

He rinsed the container in the sink, and dried it, and set it back in the paper bag.

He did not know what he would do with it. He thought, absurdly, that he ought to return it. Then he thought of what that would mean. He would have to walk it up three flights of stairs, to a glass-fronted office, and set it on a desk. He would have to say something. He would have to look at the man who had put it there.

He put the bag in the drawer of his own desk, under a stack of old reports, where no one would see it.

Then he turned out the lamp, and sat in the dark, and for the first time in nine days did not feel cold.