The bell woke her, and this time she was ready for it.

It rang once, low and round, at the end of the long exhale of the sea, and Maren lay in the grey half-light with her eyes open and counted the breaths that followed. Ten in. Ten out. The bell again. She had been in Halvane for two nights, if you counted the nineteen hours she had lost, and her body had already begun to keep time by the thing. That was the trouble with rhythm. You did not decide to belong to it. You simply woke one morning and found you had been keeping step for days.

She dressed in the dark: her own jeans, stiff with dried salt and brushed clean as well as she could manage, and the grey shirt that was not hers, because her sweater still smelled like a harbor and she was not yet ready to think about why that had stopped bothering her. She had slept three hours, perhaps four. In the hours before that she had lain awake composing a list in her head, because lists were what she did when the world refused to be assessed.

One. A man whose job was the sea, whose wrist was marked with moving ink.

Two. A book that had answered the water.

Three. Eighty-four days. Eighty-three, now.

She did not have a four. She had a space where four ought to be, and it was the exact shape of the look on his face when he saw her mother's handwriting.

The notebook lay on its board by the window, under its row of sea-stones, and she did not touch it. She had decided that in the night, too. She would not open it again until she understood what it could do. A conservator did not test an unknown solvent on the only copy.

When she opened her door, he was already standing outside it.

Not knocking. Not waiting, exactly. Standing a pace back from the threshold with his hands at his sides, the grey glove on his left, like a man who had arrived early at a place he did not expect to be welcome and had decided to bear it.

"Miss Ilves."

"Do you ever sleep?"

"When the tide allows." He studied her for a moment: the bandages, the borrowed shirt, the shadows she knew were smudged under her eyes. "You asked to see the work. I said not yet. It is not yet. But there are things you should know before you set foot below the bell-landing, and I would rather say them there than here."

"I didn't ask to see the work."

"No," Tavian said. "You asked what the bell was, and what I did with my hand over the water. You asked with your face, at supper. I am not a quick reader of people, but I am not blind."

She had thought she had been careful at supper. She revised her estimate of him, and then, because it was easier, her estimate of herself.

"Lead on," said Maren.

The stairs went down for a long time.

They went down through the middle of the tower, past her round room and the kitchen and a landing hung with oilcloth coats, past a narrow door that she knew by now was the Warden's own. Beyond that the steps changed. The stone grew darker and wetter, patched with a pale green fur of damp, and the air took on a taste: not just salt but something finer and more mineral, like the inside of a coin. The sound of the sea grew from a presence to a pressure. By the fortieth step she could feel it in her ribs, in, out, in, a great slow muscle working somewhere very near.

He held the lamp at his shoulder, low, so that the light fell ahead of her feet and not into her eyes. She noticed that. She noticed that he walked one step lower than she did, always, so that if she fell she would fall onto him. Whether he knew that he was doing it, she could not tell.

The stair ended on a round stone landing, perhaps eight paces across, with a rail of iron gone black with age. A bronze bell hung from a beam over the middle of it, as large as a cartwheel, green at the lip. It was not ringing. The air around it trembled anyway.

Beyond the landing was a door.

It was the same door she had seen him close with two fingers the day before: low, heavy, bound in iron, with a pale carved lintel she could not read in the lamplight. There was no handle. In its place was a shallow basin cut into the stone beside the frame, filled with water, perfectly still.

"Three rules," said Tavian. "I will not repeat them, because I do not expect to have to."

"You say that like a man who has had to."

"I have had an apprentice." It was the briefest flicker, and then the door of his face closed over it. "The first rule. You do not go through this door unless I am with you. Not at night. Not in a storm. Not if you hear something that sounds like someone calling your name."

"Does that happen?"

"The second rule," he went on, as though she had not spoken. "You do not touch the pages. Not to steady yourself, not to move them aside, not out of curiosity. Whatever you see, they are older than either of us, and some of them are holding more than you can see."

She waited. He did not seem to be going on. "And the third?"

He was quiet for the length of one long breath of the sea.

"You do not touch the Warden's left hand."

The bell trembled overhead. In the basin beside the door, the still water rippled once, as though it had heard.

"That's a strange rule," said Maren.

"It is an old one."

"Why?"

"It is the rule."

"That's not a reason. That's a label." She heard her own voice go crisp, the professional edge that came up when a client told her that a binding had always been that way and could not be questioned. "I'm not trying to be difficult. But if I'm going to live in your tower for eighty-three days, I'd like to understand the hazards. If it's contagious, tell me. If it's dangerous to me, tell me. If it's dangerous to you..."

She stopped, because his face had changed again, and this time the closing was slower.

"Eighty-three," he said. "You have been counting."

"I count things. It's my only vice."

"It is not a hazard to you." He said it flatly, and with a care that told her he had checked the sentence for lies before offering it. "That is all I will say."

"So it's dangerous to you."

He did not answer, which was an answer. Maren pushed hair back from her face with a bandaged hand and let out a breath she was fairly sure he could hear.

"All right," she said. "Three rules. Door, pages, hand. I'll write them on my wrist."

"That will not be necessary."

"It was a joke."

"I know," said Tavian, very seriously, and she found, to her great irritation, that the corner of her mouth had turned up.

It was the dampness that did it.

She took one step back toward the stair, to give him room to lead, and her heel came down on the lip of the bottom step where a year's worth of slow green slime had gathered, and her boot went out from under her with a soft, wet slide. For one long second the lamp swung, and the bell swung, and there was nothing under her, only the slow uncaring pulse of the sea.

He moved faster than anything that tired should have been able to.

His right hand closed around her upper arm. His other arm, the left, stayed pinned to his side, rigid and withdrawn, and she registered that even in the middle of falling: the way he caught her with one hand and held the other away from her, as a man holds a pan he knows is hot. He pulled. She came against his chest with her palms flat on his coat, and the lamp clanged on the stone, and neither of them breathed.

He was warmer than she had expected. That was the first stupid thing she thought. The second was that his heart was going fast, as fast as hers, under the heavy wool. The third was nothing at all; she had run out of thoughts. She was aware of the line of his jaw an inch above her forehead. Of his breath, which smelled faintly of the same cold green tea he had given her. Of the way his fingers, through the sleeve of her shirt, were holding her not hard but exactly, the way you hold a thing you have only just learned the weight of.

"You are all right," said Tavian. His voice came from somewhere over her head, lower than she had heard it.

"I'm fine."

"You are shaking."

"That's the stairs. They shook first."

He did not laugh. But the arm around her loosened by the smallest degree, and she did not move away, and the moment stretched, thin and bright, in the cold, wet dark.

Then she did what she had always done when she was frightened. She looked for something to fix.

It was the lamp. It had rolled to the edge of the landing and its flame had guttered, and when she twisted in his grip to reach for it, the cuff of his left sleeve, pushed back by the sudden movement, slid up his forearm and showed her the underside of his wrist.

Under the grey glove's edge the skin was white. Not pale: white, the dull colorless white of a thing that had been kept from the light, and across it lay the line she had seen on the balcony. By daylight it was worse than by starlight. It was not a single thread. It was a finely branching thing, like a river seen from far above, a black trunk with smaller channels running off it, each as thin as a hair, spreading up toward the inner elbow under his sleeve. At the edges, where it met unmarked skin, the flesh was dry and dull and faintly cracked, like paper that had been left too long beside a fire.

She knew that texture. She had spent her life treating it.

She did not think. That was what she would remember afterward: that her hand was already out before the rest of her had decided anything. The second self, the one who never panicked, had simply taken over, and what it said was, Look at the damage. What does it need? Her fingers closed on the air an inch from his skin, reaching to turn the wrist toward the light.

"Do not."

It was not loud. It was a flat, hard, final sound, like a door shutting in another room. He had stepped back so fast that her balance went and she had to catch the rail. His left arm had come up and across his chest, the sleeve yanked down, the glove pulled tight, and the face above it had gone as cold and carved as the lintel.

"That was the third rule," said Tavian. "I said it half a minute ago."

Heat rose to her face, hot enough that she was grateful for the dark. "I wasn't going to hurt you."

"I know."

"I was going to look at it. That's all. It looks like it's drying out, like the edges are lifting, and if you've been putting anything on it, you may be making it..."

"Miss Ilves."

"...worse, and I know I'm not a doctor, but I've seen what happens when..."

"Maren." He had not used her name before. It went through her like a pin. "Please."

He had not said it harshly. That was the worst of it. It was not a command, and it was not a plea; it was something quieter and more tired, a man asking, in the last of his strength, not to be pushed. She closed her mouth.

"I did not mean it as a cruelty," said Tavian, after a moment. He was not looking at her. He was looking at the bell. "But it is not a thing that can be fixed by someone looking at it. I would ask you to believe that."

"That's not the same as telling me I'm wrong."

"No." A pause. "It is not."

She bent and picked up the lamp, because her hands needed something to do, and relit the wick from the flame in the basin without asking whether that was permitted. Nothing happened. The water in the basin gave up a small thread of fire, like a tide-pool holding a star, and the light came back warm and steady.

"I'll keep the rule," she said. She was proud of the evenness of her own voice. "I don't have to like it."

"You do not have to like any of it."

"Good. Because I don't."

He let out something that was almost a breath, almost a laugh, and was gone before she could be sure. Then he turned and went up the stairs ahead of her, one hand skimming the wall, and she followed, a step behind and a step above, so that if he fell, she would fall onto him. She did not decide it. She noticed it halfway up, and kept doing it anyway.

*

Tavian did not go to the balcony that morning. He had meant to. He went instead to the round room on the third landing, and stood in the open door of it, and looked at the book on the board.

She had left it as he had arranged it: the cover propped on its wedge of linen, the leaves interleaved with grey, the smooth stones holding down the corners. She had not changed a thing. He found that he had been waiting for her to change something, so that he would have an excuse to be angry. She had left it exactly as he had done it, because it was right, and he had known as he did it that she would know it was right, and for some reason this was the thing that undid him.

He did not go in. A man did not enter a woman's room because her mother's book was lying in it.

From the doorway he could see the page, or the top third of it. Low water. Count the pages twice.

The hook on the descender was exactly as he remembered. Nine years was a long time to remember a person's handwriting, but he had been trained in a trade that kept him looking at ink for most of his waking hours, and he would have known those letters in his sleep. He had known them in his sleep. He had stood on this threshold at twenty-two and watched that same hand write a line on a scrap of paper, and press the scrap into his palm, and close his fingers over it.

Promise me, she had said. It was the voice he remembered best, low and rough and a little amused, even then. It was the last sentence anyone had ever asked of him that he had been unable to refuse.

He thought of the woman at the bottom of the stairs, with her hand stretched out and her chin set, saying I'm not a doctor and then going straight on to diagnose him. He thought of the stain of blue-black on her fingers. He thought of the way she had said to make old, broken paper last longer without making it new, and of what it had cost him to keep his face still.

He could tell her. It would take perhaps a minute. He knew the sentences. He had turned them over on the long nights until they were smooth.

Then she would ask the next question, and the next, and somewhere in that chain was a page he had promised never to let her put her hands on, and a price he had promised never to let her pay. He had kept that vow for nine years in an empty tower. He had not expected to be tested by a stranger who sat with her feet tucked under her at the end of his supper table and laughed at his jokes like a person surprised to find that she could.

Not yet, he told himself. Not until I understand what she is. Not until I know whether she has come for me, or for them, or only by accident.

It was the oldest excuse in the world, and he knew that, and he turned from the door anyway.

*

She did not mean to go back to the stairs.

She told herself she was only looking for the kitchen. It was a plausible lie, and she nearly believed it, which was how she knew it was one. She went down in the grey middle of the day with her hands in her sleeves, past the oilcloth coats, past the Warden's door, down to the cold green dark where the air tasted of coins, and she stopped on the last step with her hand on the rail, well short of the iron-bound door.

The landing was empty. The great bell hung unmoving in its lamplight. In its basin the still water held a dim reflection of the beam above, perfectly motionless. She could hear her own heart, and under it, in, out, the vast patient breathing of the sea.

"Rule one," she muttered. "Door. Rule two. Pages. Rule three..."

She was not going to open the door. She wanted to be clear on that, in case anyone was keeping notes. She had been told, plainly and with great gravity, what not to do, and she was a person who respected a labeled hazard. She had simply come to look at the water in the basin, because it had lit her lamp, and she was a conservator, and if there was a substance in this tower that could do that, she wanted to see how it behaved.

She crouched at the stone lip and looked down.

The water was clear to the bottom, and the bottom was not stone. It was pale, almost white, and it was fibrous: a mat of fine tangled threads, fine as hair, that lay in the basin like a drowned fleece. She knew what she was looking at before she let herself know. It was pulp. It was paper pulp, rag and fibre and something green she did not have a name for, steeping in clear water, being kept alive.

"Oh," she said softly. "Oh, you are lovely."

The water moved.

It was not the bell. The bell had not rung. It was a long, slow, spreading ripple, outward from the center of the basin, and as it reached the edge of the stone the fibers lifted, all together, and drifted a hand's breadth in one direction. Toward the door. As if the water in the basin had turned, the way a plant turns toward a window, to the thing it was attached to.

Through the iron-bound wood, very faintly, came a sound.

She had heard it in her work a thousand times, in the quiet of the bench: the dry whisper of a page being turned in an empty room. But this was not one page. This was a rustle like a wheat field in wind, ten thousand fibres letting go of ten thousand others, and under it, so deep that it was less heard than felt, a sound like slow, careful tearing.

Above her head, the bell shivered, though nothing had struck it.

And the black line that she had seen on a man's wrist, a floor above her and a wall away, in her mind's eye gave one small, sinuous move, as if somewhere beneath this tower a page had just come undone, and a hundred feet of stone were not enough to stop it from being felt.