On Monday morning they were very polite.

It began at the kitchen door. Elias came out of his room at a quarter to seven, dressed, gloved, with his coat over his arm, and found the table already laid. There was a pot of tea under a knitted cover. There was toast in a rack, cut in neat triangles. There was a single white cup at his place, with the handle turned toward his right hand. And at the stove, with his back to the room and his sleeves rolled to the elbow, stood Luke, frying an egg.

"Good morning," said Luke.

"Good morning."

That was all. Neither of them used a name. It was the first time in three weeks that either had failed to, and Elias heard the absence as one hears a clock stop. He sat. He poured his tea. He ate a triangle of toast and did not taste it, and across the table Luke ate his egg and read the newspaper and turned the pages in a slow, even rhythm, and the clock above the door went on ticking.

It was perfectly pleasant. It was like breakfast in a good hotel.

Neither of them mentioned the night.

It lay in the room with them like a third person, tall and silent and bare-headed, and both of them stepped around it with a terrible grace. Luke asked whether he had slept. Elias said that he had. Elias asked whether the day would be busy. Luke said that there was a budget meeting. They discussed the weather. They agreed that the rain was heavy for November. At twenty past seven, Luke rose, and rinsed his plate, and took his coat from the hook. He did not look back from the door.

"I will see you this evening," he said.

"Yes."

The lock turned. The footsteps went away.

Elias sat alone with the cold tea and the knitted cover and the third chair, and understood that something had been withdrawn.

It was not anger. He turned the thing over carefully, as he would have turned a specimen, and could find no anger in it. It was a kind of quiet retreat, a tide going out. And it went on all that day, and all the next.

He saw it first in the small things.

The cup of tea that Luke had left outside his door every morning for three weeks, still warm, on the boards, did not appear. The hand that had rested on the doorframe each night at bedtime, high above the head, as a man leans against a wall when he is very tired, was gone. Even the way the man moved through the apartment had altered. He walked in wide, careful curves. He kept to the far side of the passage. When they met in the narrow hall by the linen cupboard, on Tuesday evening, Luke stopped a full six feet away, and said, "After you," and stood with his back against the wall until Elias had gone by.

He did not touch the cloth of Elias's sleeve. He did not reach past him for a door. In two days, Elias counted, they did not come within an arm's length of each other.

It was courtesy. It was an exquisite, scrupulous, almost unbearable courtesy. It was exactly what a decent man ought to do, after what had nearly happened in a kitchen at three in the morning. He had said that he would not be able to stop, and now he was making certain that he never had to begin.

And it was the worst thing that Elias had ever endured.

He did not understand it. He had spent twelve years in the careful architecture of distance, building walls, laying out margins, measuring the width of a corridor in the length of an arm. He had asked for exactly this. He had stood in doorways and said: not too near. And now that someone granted it so fully, with such gentle exactness, that there was no flaw in it anywhere, he found that he could not breathe.

He went to work.

It was the only remedy he knew. On Monday he did four examinations before noon, two of them from the backlog that Halloran had left, and wrote the reports in a single sitting. On Tuesday he reorganized the toxicology archive. On Wednesday he stayed in the lab until two in the morning, labeling slides, and when he finally went to the locker room he lay on the cot with his coat over him and slept for three hours, and woke with a cold ache in his shoulder and a peculiar feeling of relief.

He did not go home on Thursday.

"Doc," said Wade, on Friday morning, in the doorway. He held a paper cup in each hand and looked, Elias thought, rather ill himself. "You've slept here twice. I mean, it's none of my business. But it's twice."

"I have a great deal of work."

"I know. I know you do." Wade hesitated. He came a step into the room and set down one of the cups at Elias's elbow. "It's just, the captain does it too."

Elias looked up.

"Stays late. Every night this week. I've been in at seven, and he's still in the building from the night before. I saw him at one in the morning on Wednesday, walking down the third-floor corridor with a file under his arm. He didn't see me." Wade rubbed the back of his neck. "I don't want to say anything. But you guys have been like, I don't know, two guys on opposite ends of a seesaw. And I thought, I just thought somebody ought to mention it."

"There is nothing to mention."

"Okay." Wade backed toward the door. "Okay. I just. The tea's from the machine. It's bad. I'm sorry."

He went out. Elias sat looking at the cup.

It was true. He knew it. It was in the way that Luke's car had been in the lot on Wednesday night, when he drove past at eleven. It was in the light that burned in the glass office on the third floor, a small gold square in the dark face of the building, hour after hour. It was in the long silent evenings at the apartment, when the two of them sat at either end of the oak table with a book each and did not turn a page.

They were hiding from each other in the only way that two such men knew how.

By hiding in their work.

On Wednesday night he went back to Highland Tower for a clean shirt, and the apartment was dark.

He let himself in at ten past eleven, quietly, with the key in his hand. The hall lamp was out. The kitchen was empty and spotless. The oak table gleamed under the window, and the teapot stood on the counter in its knitted cover, cold. He stood for a moment in the stillness, listening.

Nothing. A tick in the pipes. The slow sigh of wind on thirty-one floors of glass.

He went down the passage in his stocking feet. He passed the linen cupboard, and the bathroom, and the white door of the room that was his. He did not go in. He stood a moment at the door with his hand on the wood, and then he turned, quite deliberately, and looked down the length of the corridor toward the other end.

A line of light lay under the bedroom door.

It was very thin. It was the pale yellow of a bedside lamp, turned low, and it fell across the boards in a narrow bar. It was perfectly still. He stood and looked at it, with the whole dark apartment around him, and heard from behind the door the faint small sound of a page turning.

He did not move for some time.

Then he opened the door of his own room, and went in, and sat on the bed in the dark with his coat on. He did not turn on the light. He sat with his hands folded on his knees and listened, and after a while, from the far end of the hall, he heard a step.

It was the sound he had been waiting for. He knew it, with the dull certainty of habit. It came down the passage slowly, one foot after another, on the bare wood. It was the step of a man who has risen from his bed in the night and does not wish to be heard.

Eleven steps. He counted them.

It stopped outside his door.

He did not breathe. He sat in the dark with every nerve in his body drawn tight, and heard on the other side of an inch of painted wood the faint rustle of cloth, the slow even sound of someone standing still. A second. Two. Three. He could almost feel the warmth of the other man's presence through the panel, as one feels the warmth of a stove in the next room.

He thought: he will knock.

He thought: he will say my name.

The seconds went by. The silence stretched. Somewhere a long way below, a lorry went through the street with a low groan, and was gone.

Then, very softly, the step moved on. It went to the end of the passage, to the bathroom door, and he heard the tap run, and stop. It came back. It came back to the very same place, and paused again, a little longer. Then, at last, it turned, and went away down the hall, eleven steps, and a door closed with a small click.

Elias sat in the dark with his hands in his lap.

He had not known that he was shaking. It had come on him quietly, from somewhere deep, and now it ran through his hands and up his arms like a tremor in a wire. He pressed his palms flat against his knees. He did not cry. He had no wish to. He only sat and trembled, and thought: he came to my door.

He came, and he stood, and he went away.

It was almost worse than the silence. A man who stayed away had made a decision. A man who walked to a door every night, and stood outside it, and walked back, was suffering something that no decision could have cured. Elias knew it as he knew the sound of his own pulse. He had stood outside doors himself. He had stood outside one for twelve years.

He lay down on the bed with his clothes on, and in the narrow dark he began, without having meant to, to listen for it.

It came the next night. And the next.

He learned the rhythm of it. About midnight, a floorboard in the far room would creak. A bar of light would show under the door, and go out. The step came slowly, eleven paces, with a faint hesitation at the seventh, where a loose board gave a small dry sound. It stopped. It stood. It stood for a count of sixty, and then for a count of ninety, and on Thursday for nearly three minutes. And then it went back.

Neither of them ever spoke.

It was, he thought, a kind of conversation. It had a grammar. A man stood outside a door and said: I am here. I do not come in. A man sat inside, on the other side, in the dark, and said: I know. I do not ask. And it went on, night after night, without a word, like the tolling of a very slow bell.

He had never been so conscious of another human being in his life.

On Friday he washed the container.

It was at three in the afternoon. He had been sitting in the lab for an hour with a case file open in front of him, not reading, and the thought had risen in him as quietly as a bubble in a glass. He opened the bottom drawer of his desk. Beneath a stack of old reports, beside the folded paper bag from a night in October, sat a round plastic tub with two clips on the lid.

He lifted it out and looked at it.

It had been there a month. He had not been able to throw it away. He had not been able to return it, either, and it had sat in the drawer like a small stubborn animal, reproaching him every time he reached for a pen. He took it to the sink. He ran the hot water until it steamed. He washed it, inside and out, with the soap that he used for instruments. He dried it. He held it up to the light.

It was clean. It was very clean. It shone like a thing newly made.

He carried it home in his bag. It was a long, strange journey, on the bus, with the thing riding in his lap like a pot of seedlings, and several times he thought of turning back. He told himself that it was a trivial matter. A man could return a container. A man could do it without ceremony, and without a word.

He let himself into the apartment at six.

The kitchen was empty. He stood for a moment, with the bag over his shoulder, and then he went to the oak table and took out the tub and set it down. He did not set it in the middle. He put it at the place where Luke sat, at the end, by the window, a hand's breadth from the edge. He turned it so that the clips faced the chair.

Then he stepped back, and looked at it, and thought: that is absurd.

It was a cheap plastic tub. It stood on the table in the evening light with its two small hooks and its smooth clean lid, as plain as a stone. But it seemed to him, standing there, with his hands hanging empty, that he had set down something much larger. A flag. A white handkerchief. A plain unlettered note.

I kept it, he thought. I could not give it back. I am giving it back.

He went to his room and shut the door.

In the morning, there was a smell of ginger.

He came out into the hall at seven, and the whole apartment was warm with it, a rich golden savor of chicken and rice and broth. It drifted down the passage and found him at his door. He stood very still. He heard a spoon, and the faint clink of china, and, from the far end of the kitchen, the sound of someone moving quietly about.

He went in.

The table was laid. There was a single bowl at his place, steaming. Beside it, on the white cloth, sat the plastic tub, and the lid was off, and it was full to the brim with soup.

Luke stood at the window, with his back to the room and a cup in his hand. He was in his shirtsleeves. The morning light lay across his shoulders and the dark rumpled head, and the steam from his tea rose in front of him like a veil. He did not turn.

"I wondered where it had gone," he said.

His voice was very quiet.

Elias stood in the doorway.

He had thought that he would have something to say. He had prepared it, the night before, on the edge of his bed. A short, polite, even sentence. I found it in my desk. I thought that you would want it back. But the words had gone, and he stood in the warm kitchen with his hands at his sides and found that the thing which rose in his throat was not speech.

"It is very clean," said Luke.

"I washed it."

"I can see."

"I ought to have returned it sooner."

"No." The man at the window turned his head, and for the first time in five days he looked at Elias, a long clear look, gentle and tired. His eyes were dark and bright. There was a faint line between his brows. "It was where it should be. I was glad to know that it was somewhere."

Neither of them moved.

Elias walked to the table. He pulled out his chair, and sat, and took up the spoon. The soup was hot, and it tasted of ginger and salt, and he ate it slowly, with his eyes on the bowl. Across the table, at the far end, there was a faint creak as Luke drew out his own chair and sat. He did not speak. He took up his tea, and the paper, and began to read.

The distance between the two chairs, Elias noticed, was four feet.

It had been six. It had been six for five days. But somewhere in the night, without a word said, something had shifted, a small inch of ground given and taken, and the oak between them seemed a shade narrower than before. He ate his soup. He did not look up.

It was not much. It was a very small thing.

But he sat in the warm kitchen with the sun on the table and the clean tub at his elbow, and a man four feet away turning the pages of a paper, and he thought that he had never been so happy to eat a bowl of soup in his life.

That evening, in the little room, he took out the black notebook.

He sat on the edge of the bed with the lamp at his shoulder and turned to the page. THINGS HE KNOWS THAT HE SHOULD NOT. The seven lines stood in their small square capitals, each in its place. He read them over, slowly, as one reads a letter that one has written to oneself, and then, with the pen between his fingers, he added an eighth.

That he knows what I do not say aloud.

He looked at it.

It was a true line. That was the terrible thing. It was as true as any on the page. In a kitchen, at three in the morning, a man had known without a word that he must kneel. He had known that the telephone was the thing. He had known, standing at a door, what the silence on the other side of it meant. It was a gift, and it was a danger, and it lay in the same place in him as every other.

He held the pen over it for a long time.

Then, with a short hard stroke, he drew a line through the whole of it, so that it could not be read.

He did not know why. It was not a lie. It was only that it did not belong on the page. The others were things that Luke knew, and ought not to have known. But this one was something else. This one was a thing that Elias knew about himself, and had not wished to see.

He closed the book.

Outside, in the passage, a floorboard creaked. A step came down the hall, slow and soft. He counted. Seven. At the seventh, the board gave its small dry note.

He sat quite still, with the notebook in his hands.

The step came to the door, and stopped.

It stood for a count of sixty. And for the first time in six nights, Elias did not sit in the dark and wait. He rose. He crossed the little room in four paces, and laid his hand against the wood, flat, on the very place where, on the other side, another hand might have rested.

He did not open it.

He only stood there, with his palm against the door, and felt through the panel the faint, steady warmth of a man who was not going away.

"Good night, Luke," he said.

It was barely a sound. It was hardly more than breath.

On the far side, there was a long silence.

Then, very low, almost too low to hear, a voice answered through the wood.

"Good night, Elias."

The step went away. It went slowly, eleven paces, and a door closed.

Elias stood with his hand on the door until the wood grew warm beneath it.