By Wednesday, the Marrowfield paper had begun to look like a real thing.

It had a spine. Alan had built it on Saturday, in the Quiet Annex, out of a timeline and a table of Ministry regulations, and since then it had grown the way a good argument grows: slowly, with a good deal of crossing out. His folders now numbered four. Green for consistent sources, yellow for gaps, red for contradictions. And a blue one, tied with a ribbon he had bought specially from the stationer's in the village, which he had labeled, after some thought, UNDER DISPUTE. It was by far the thickest.

"That one's mine," said Elen, with deep satisfaction, when she saw it.

"That one is ours."

"It's mostly mine."

"It is mostly the portion of the paper in which you have made me argue against my own conclusions," said Alan, and she laughed, and a lamp along the table flickered in warning, and she clapped a hand over her mouth with exaggerated guilt.

It was four o'clock, and the afternoon light fell through the west window of the annex in long, dusty bars. Foundations had ended an hour ago. The courtyard below was quiet, the weekday kind of quiet that settles over a school when the bells have stopped and everyone has gone off to do whatever they were pretending not to want to do. They had the long table to themselves. Elen sat opposite him with one boot hooked on the rung of her chair, a pencil in her teeth, and Hesper Vane's Ministry citation spread flat in front of her, the corners held down with a mug, an inkwell, and a small pewter frog she had apparently brought from somewhere.

"Here," she said, around the pencil. "This bit."

He leaned across to read the line she was tapping. It was a dry sentence, in the dry hand of a Ministry clerk, eighty years old. Compound unapproved; procedure not followed; license suspended.

"Unapproved," said Elen. "Not prohibited. Unapproved. Those are two different words, aren't they?"

"They are."

"So what's the difference?"

He opened his mouth to answer, and found, to his mild annoyance, that he could not. He knew the regulations. He could have recited them: Schedule One, Schedule Two, the lists of compounds that required a license to brew, the lists that required a license to possess. But the lists did not say why. They stood there in columns, as bare as a row of gravestones, and he had never once thought to ask what had killed the people underneath.

"The regulations give a schedule," he said slowly.

"They give a list. I want a reason." She took the pencil out of her mouth. "If we're going to argue that Hesper Vane was right to break a rule, we have to know what the rule was for. Otherwise I'm just waving my arms and saying 'but she saved people,' and you're waving yours and saying 'but procedure.' It's a rubbish argument. We both know it. We'd get a B."

"I would not accept a B."

"Then we need the commentary." She said it lightly, looking at the page. "There's a set. Commentaries on Prohibited Workings. Three volumes. It's the only thing I've ever heard of that explains why the lines are where they are."

Alan went still.

"Where is it kept?"

"You know where."

"The Closed Stacks."

"Just to read," said Elen. "Not to try anything. Not to take anything. Just to read why."

"No," said Alan.

He said it at once, and quite gently, with the weary firmness of a person who has said the same word to himself a great many times. It was not even an argument. It was simply the shape the answer took. The Closed Stacks were closed. That was the whole of it. They had been closed for four hundred years by people who knew a great deal more than he did, and the notion that a pair of second-term students might stroll in on a Wednesday afternoon to see what was inside was exactly the sort of thing the charter had been written to prevent.

"Okay," said Elen.

He waited for the rest.

She picked up her pencil. She drew a small, careful circle in the margin of the citation, and then another inside it, and went on drawing until there was a little spiral, and she hummed under her breath, and did not say anything else at all.

It was the most alarming thing she had done all week.

He sat there, absolutely certain that he had won, and ought to feel it. The lamps glowed steadily. The pewter frog regarded him with its small cold eye. And somewhere in the back of his mind, as quietly and efficiently as a clerk filing a document, a different part of him had begun to run through the charter.

Article nine. Article twelve. Article twenty-two. He did not even have to look. The text rose up out of his memory in order, clause by clause, like a stair he had climbed so often he could have walked it in the dark. And somewhere around the middle, between the section on conduct in the common rooms and the one on the proper maintenance of lamps, a line surfaced that he had read many times and never once thought to use.

Article twenty-seven. Supervised reading of restricted materials shall be permitted to any student for the purpose of coursework, upon presentation of a written slip signed by a member of the teaching faculty, and under the continuous observation of an Archivist.

He stopped breathing for a moment.

It was right there. It had been right there all along. It was not a loophole. A loophole was a thing you found in the cracks. This was the front door, hung in plain sight with a brass plate and a bell, and the whole Academy had simply walked past it.

His heart gave a ridiculous, buoyant kick, as if he had solved an equation. He felt the corners of his mouth begin to move, and suppressed them hard.

"What?" said Elen.

"Nothing."

"You've got a face."

"I do not have a face."

"You have the face you get when you've found a mistake in someone else's footnote." She leaned her chin on her hand and looked at him with the bright, patient, entirely unfair attention of someone who had known exactly what she was doing. "You've thought of something."

He pressed his lips together. The truth was that she had done nothing. She had asked once, accepted his answer, and let him go. And in the ten minutes since, his own mind, left alone with the question, had walked straight to the only door in the building that was not locked.

"Article twenty-seven," said Alan, with enormous dignity, and was annoyed to hear that his voice had gone up a note.

The professor of Foundations received him in a narrow tower study at the top of forty-three steps, among stacks of ungraded papers that leaned against one another like drunken colleagues. He was in his shirtsleeves, with chalk on his nose, and he looked up from a scroll with the expression of a man who suspected, with some pleasure, that he was about to be impressed.

"Mr. Valemont. You have a question."

"I have a request, sir. A slip for supervised reading, under article twenty-seven, for the Marrowfield paper."

"Which commentary?"

"Commentaries on Prohibited Workings, volumes two and three. The Ministry's citation of Hesper Vane uses the word unapproved. We would like to establish what the term excludes."

"We."

"Miss Joy and myself. As co-authors."

The professor looked at him over the rim of his spectacles for a long, unhurried moment. Then, without any comment at all, he drew a printed slip from a drawer, dipped his pen, and filled it in a flowing, careless hand.

"I have been teaching here for thirty years," he said, blowing on the ink. "In that time I have had four students find article twenty-seven on their own. Three of them were Valemonts." He folded the slip once and held it out. "A clean record is an instrument, Mr. Valemont. It can be a very fine one. Be sure you use it for something worth the edge."

Alan took the slip. It was lighter than he had expected.

"I will, sir."

"And Mr. Valemont." The professor had already turned back to his scroll. "You will observe that I wrote both names."

He had. Beneath the signature, in two clean lines: A. Valemont. E. Joy.

Elen was waiting at the foot of the tower stair. She had been, apparently, for a while, because she was sitting on the bottom step with her chin on her knees and her scarf around her head like a very small, very patient nun. She looked up when his boots rang on the stone, and he held up the slip without a word.

She read it. She read it again. She put her hand over her mouth.

"You found the door," she whispered.

"It is not a door. It is an article."

"You found the door, Alan." She leaped to her feet and seized the slip with both hands, as though it might blow away. "It was there the whole time! It was there, and nobody, I've asked three teachers, and they all said no, and you just." She broke off, and what showed in her face then was so unguarded, so entirely, simply delighted, that he had to look at the wall. "You're brilliant. You know that? You're actually brilliant."

"I read the charter."

"So did I! I read the amendments! I didn't find it!"

"You were not looking for a route," said Alan. "You were looking for a reason."

She stopped. She considered this, head tilted, with a look he was learning to recognize: the look of a girl putting something where she could find it again.

"Conditions?" she said.

"One hour. Supervised throughout. Nothing leaves the room."

"Agreed."

"No tampering with wards, locks, or shelves."

"I wouldn't dream of it."

"You would dream of it," said Alan. "You will not act on the dream."

"I will not act on the dream," said Elen, solemnly, and the dimple appeared. "Lead on, Mr. Valemont. I'm in your hands."

He walked ahead of her to the library, and did not look back, and was very glad that she could not see his ears.

The Closed Stacks lay below the reference hall, down a spiral stair of cold gray stone that smelled of dust and old paper and something faintly metallic, like the air before rain. At the bottom stood a door. It was not a large door. It was a low iron one, set in an arch of black stone, banded with three different wards, each of them glowing a different color: blue for sound, amber for fire, and a thin cold green that Alan did not recognize and did not like.

Beside it, at a small desk lit by a single lamp, sat the Archivist.

She was a spare, upright woman with iron-gray hair coiled in a knot and fastened with a pencil, and spectacles on a chain, and the particular stillness of a heron standing in a shallow stream. She did not look up until Alan placed the slip on the desk. Then she read it, twice, with her lips slightly pursed, and raised her eyes to Elen.

"Joy," she said.

"Hello!" said Elen.

"Three notes on your file."

"Three and a half. There was a disputed one."

The Archivist said nothing. The silence was extremely long, and extremely cold, and into it Alan said, in the calmest voice he owned, "Miss Joy is the named co-author, Archivist. Professor has signed for both. Article twenty-seven makes no provision for the exclusion of a co-signatory."

The Archivist's gaze moved to him. It rested there. It had the mild, thorough, unhurried quality of a hand running along a shelf for dust.

"Valemont," she said. "Ninth generation."

"Yes, ma'am."

"Your grandfather was very fond of this room. He used to sit there." She nodded at the corner. "He never once asked me to bend a rule."

"No, ma'am."

"Neither, I notice, have you." She laid her hand flat on the slip, and with the other drew a key from her belt. "One hour. You will sit where I can see you. Both of you. If either of you leans toward a shelf, I will know."

"We understand," said Alan.

"I do not," said Elen, with great sincerity, "intend to lean."

The Archivist unlocked the door.

The reading room was no larger than a pantry. One long table, polished dark. Two straight chairs. A single lamp, hanging from a ceiling chain, which burned with a soft, steady, golden light that seemed to hold the whole room in the palm of its hand. And behind a brass grille that ran along the entire back wall, rank upon rank, in rows that vanished into the dark, the Closed Stacks themselves: ten thousand spines, stamped in faded gold, some of them so old that the leather had gone soft as skin.

Elen stood in the doorway and did not say anything at all.

He had not seen her silent twice in a single day before. She stood with her hands pressed together under her chin, as a person does in the presence of something very large and very old, and her eyes went along the grille, from end to end, with a look so hungry and so reverent that he felt a strange tightening in his throat.

"Sit," said the Archivist, from the doorway. "I will fetch what you asked for."

She came back in four minutes with a single book.

It was a large, flat, heavy volume bound in dark green cloth gone gray at the edges, with a title in cracked gilt: Commentaries on Prohibited Workings, Vol. II, Of Binding and of Marking. She set it on the table in front of them, squared it with one fingertip, and stood back.

"Volume three," said Alan.

"Is out."

"Out, ma'am?"

"It is not on the shelf." The Archivist's voice was perfectly even. "I will tell you where it is when you ask the question properly. In writing. Until then, you have volume two. You have fifty-three minutes."

She withdrew to her chair by the door, and folded her hands, and became a heron again.

The book was written in Old Court.

It was a script nobody used anymore: dense and slanting and heavily abbreviated, full of looped tails and little crowns over the vowels, the formal hand of the Academy's founders, who had apparently regarded legibility as a form of vulgarity. Elen bent over the first page and her face fell.

"Oh no," she said softly. "Oh no. I can read about a third of it. I think. If I squint."

"I can read it," said Alan.

She looked up.

"It is a family requirement," he said, a little stiffly. "Valemont children are taught Old Court at seven. My father considers it essential to the understanding of the charter." He pulled the book a few inches toward himself. "Which it is."

"You can read this."

"Fluently."

Her face did the thing again. It went all the way open.

"Then read it," said Elen. "Out loud. Please. I'll tell you what the plants mean, and you tell me what the words mean, and between us." She stopped, because she had realized how it sounded, and went faintly pink, and finished, "Between us we might actually understand it."

He should have said no. He felt it, the small gathering of resistance in his chest. He had been very firm with himself on the stair. But it was a very small room, and a very warm lamp, and he looked at her hopeful, ink-smudged, shining face, and the resistance went out of him like a breath.

"Move your chair," he said. "You will not be able to see."

She moved it. The table was narrow, and the chairs were close, and by the time they were both settled over the book, her shoulder was an inch from his, and the heat of her was a faint steady presence along the whole left side of his arm. He could smell mint and pine and old paper. He kept his eyes on the page.

He began to read.

It came slowly at first, as a language does that has not been spoken aloud for years. He gave the sentence in the old form first, softly, and then in plain speech, and she nodded, and said what the herb in the margin was and where it grew, and between the two of them, line by line, the meaning came up out of the paper like a figure out of mist. The book spoke in a dry, deliberate, rather beautiful voice. It said that the Academy had never forbidden a working because it was strong. It said that strength was no crime. It spoke of binding and marking, and the cost of each, and of the long shadows both could throw.

He read, and she listened, and sometime in the second quarter hour he realized that he had stopped translating for her and begun simply to read, in the old cadence, low and level, the way his grandfather had read to him in the winter evenings of his childhood. And that she had stopped interrupting. She sat with her chin on her fist, and her eyes half closed, and her lips very slightly parted.

"Do the voice again," she said softly.

"I have no voice."

"The one you do for the old bits. It goes all low and careful. Like you're carrying something." She opened one eye. "I like it."

He lost his place.

It took him a full four seconds to find it again, and when he did, his voice had gone slightly hoarse. Her hair had fallen forward over her cheek. She tucked it behind her ear with two fingers, a small, absent, unconsidered gesture, and the lamplight ran along the edge of her face and caught in the dimple, which had arrived, quite without being called, and stayed.

He read the next line twice before he understood a word of it.

"What does it say?" said Elen.

"That which is forbidden," Alan translated slowly, "is not always that which is wrong, but that which has been feared. And fear is a poor lawgiver."

She was very still.

"Read that again."

He did.

She sat back. She let out a long breath, and looked at the lamp, and did not say anything for so long that the Archivist, at the door, turned a page.

"My mother says that," Elen said at last, quietly. "Not like that. In her words. She says a closed door is only a question with a lock on it. She says you can walk past it all your life and never know what you're missing, or you can stop and ask what the lock is for. And if you understand it, if you really understand why it's there, then you can respect it properly. Or you can find out it isn't there for the reason people think." She turned a little toward him, and her eyes were very bright. "I'm not trying to break anything, Alan. I swear. I just want to know why."

"I know," he said.

He was surprised to find that he did.

It was not an admission he had meant to make, and it sat in the small golden room like a stone dropped into water, and spread. She did not smile. She only looked at him a little longer than a person looks at someone who has merely agreed with her, and then, quite deliberately, she turned back to the page.

"Go on," she said. "Please."

He went on.

He read of binding, and of marking. He read how the old workings had been divided into orders, and how the most dangerous of them could not be cast lightly, because they could not be cast without leaving a trace. It took him some time to be sure of the sentence, because the old scribe had been fond of clauses, and it was only when Elen asked him to read it a third time that he understood it fully and felt a small cold ripple run down the back of his neck.

"Every binding of this order," he read, "leaves its mark upon the one bound, as a seal upon wax. And no working of this order may be wrought save by one who holds the key of the place wherein it is kept."

"A seal on wax," said Elen. "So, a fingerprint."

"Yes."

"And a key. Someone has to hold the key." She tapped the page. "So it's both. You can't do it without permission, and you can't do it without leaving proof." She looked up, and her face was alight with something quite different from delight. It was pure interest, the bright, hard interest of a mind taking hold of an idea. "That's clever. That's so clever. It means whoever uses one can always be found. It's the opposite of what people think. They think the forbidden ones are the ones nobody can catch."

"It is a safeguard," said Alan, who had gone quite cold, without knowing why. "The Founders were cautious."

"Why does it say keeper? Of the place where it's kept? What place?"

"I do not know." He read the line again. "It does not say."

He wrote it in his notebook. He did not know why he did that either. He wrote keeper of the key and underlined it once, in small neat letters, and they went on.

It was the Archivist who called time, with a single dry cough.

They had twelve minutes left, and Alan, who had been gathering himself to propose a break, instead stood and went to the grille, intending only to ask whether volume three might be looked at, in the formal manner, before the hour was out. He had not meant to look at the shelf. He had not leaned. He would swear to that. But the Archivist had risen and gone to the drawer where the index cards were kept, to check the entry, and in the moment before she shut the drawer again, he saw it.

The card was cream-colored, and stiff. It was clipped to the front of the drawer, above the others, in the place where a withdrawal slip was always pinned. It said, in a hand so straight that every letter seemed to have been drawn against a ruler:

Withdrawn for Council review. No date of return.

That was all. There was no signature. There was no date. There was only the hand: upright, narrow, unhurried, and so correct that it seemed less like writing than like a form of discipline.

He had seen it before. He was certain of that. It tugged at the back of his mind like a thread pulled through cloth, and he could not say where.

"Out," said the Archivist, closing the drawer. "As I said."

"For how long?" said Elen.

"The card does not say."

"Who took it?"

"The card does not say." The Archivist's voice was dry. "You may ask the question in writing, Miss Joy, and I will answer it in writing, and you will not be told anything the card does not say."

And then there was a bell. It rang above the door, soft and clear, summoning the Archivist to the reference desk upstairs, and with a look at them both, brief and precise, she stepped out and shut the iron door behind her. They heard the key turn. The lamp swung gently on its chain.

They were alone.

Elen was looking at the open drawer.

It was a small thing. She did not move. She stood perfectly still, her hands at her sides, looking at the card, and the whole of her was a single suspended question, like a bird on a wire, and Alan understood exactly what she was weighing. The key was on the desk. The card was an arm's length away. They had perhaps three minutes.

He thought: if she does it, I will have to report her.

He thought: if I report her, I will never see that face again.

He thought of neither, in the end. What came out of his mouth was only her name.

"Elen."

She did not turn. "I know."

"You said you would not act on the dream."

"I know." Her voice was small. "I'm not. I'm just looking."

"If we take it," said Alan, "we cannot ask the Archivist what it says. If we ask her, she can answer. If we take it, no one can." He drew breath. "Ask properly. Please."

It was the second time he had said please to her. He heard it, and wondered at it.

Elen was quiet for what felt like a long time. Then she let out her breath, slowly, and some of the tension went out of her shoulders. She turned to him, and for a moment her face was very young, and very honest, and very tired of its own curiosity.

"Properly," she said.

"Properly."

"It's so much slower."

"Yes."

"Fine." She went to the table, tore a clean sheet from her notebook, and uncapped her pen. "You write it. Your handwriting's better. I'll sign."

He wrote it. A formal request for the location and status of Commentaries on Prohibited Workings, Vol. III, cited under the Marrowfield paper, article twenty-seven. They both signed. Her hand was quick and slanting and untidy, and beside his, on the same page, it looked like a swallow beside a column of ants. When the Archivist returned, five minutes later, she looked at the sheet for a long moment. Her expression did not change. But she folded it, and tucked it into her sleeve, and said, to nobody in particular, and with the faintest roughness in her dry voice:

"It has been a long while since anyone filed one of these."

And then, "Time."

They climbed the spiral stair in silence.

It was not an uncomfortable silence. It was the full, tired, rather dazed silence of two people who have been somewhere quite far away and have not yet quite come back. The reference hall, above, was bright with late afternoon. A clerk stamped something. A first-year dropped a pen. The ordinary world rushed in, and Alan blinked at it, and found that his notebook was open in his hand and he had not noticed.

Elen stopped in the doorway to the main stair.

"That was the best hour I've ever had in this library," she said.

It was not said lightly. She said it plainly, a simple fact, her head a little bent and her fingers worrying the edge of her scarf. Then she looked up.

"I know you didn't want to."

"I did not want to," said Alan, with scrupulous honesty. "At first."

"And now?"

He thought about it. He owed her that. The truth was quite strange and not very flattering. It was that the thing he had been afraid of, all the way up the tower stair and all the way down the cold one, had never been the books. It was not the Closed Stacks, or the Archivist, or even the charter. It was that he would walk into that small golden room and find himself glad.

And he had been.

"Now," he said, and cleared his throat, "I believe that if we return, I should bring a second lamp. The light is poor for Old Court. It strains the eyes."

Elen stared at him.

Then her whole face broke into the biggest grin he had yet seen on it, wide and unguarded and lit from the inside, and the dimple went in so deep that it looked like a thumbprint.

"Return," she said. "You said return."

"I said if."

"You said if we return, and you said a second lamp." She clasped both hands under her chin. "That's a yes. That's practically a pledge. Alan Valemont, I'm going to have that carved on something."

"It is a conditional."

"Presently?"

"Presently," said Alan, with as much dignity as the situation allowed, which was not much.

"Then let me trade you." She was walking backwards down the stair now, scarf flying. "Saturday. I want to show you the market. The old stallholders, the ones at the back. They tell stories about all the banned things. The real ones. The ones the books don't know." She stopped. "Will you come? Not in a professional capacity."

He opened his mouth to say that he would consider it.

"Yes," said Alan.

He heard it come out. He had not planned it. It simply stood there, in the air of the stairwell, and she heard it too, and for a moment she did not say a thing. Then she nodded, once, very quickly, and turned, and took the rest of the stairs two at a time, and he heard her laugh, bright and cracked and astonished, echoing all the way to the bottom.

He stood for a long time at the head of the stairs, with the hand that had said yes pressed flat against the page of his notebook, and listened to his own pulse.

That night he sat at the desk in the dormitory, with the lamp turned low and Pip asleep with his mouth open, and the notebook open at a clean page.

He wrote the date. He wrote Observations. He wrote a good deal, in clear sequence, with no embellishment: the slip, the Archivist, the volume, the line about the keeper of the key. He wrote the passage about the seal on the wax. It filled a page and a half, in small upright letters, and when it was done he looked at it with a faint, grudging sense of satisfaction.

Then he turned to a new page, and wrote, from memory, the line from the card.

Withdrawn for Council review. No date of return.

He looked at it for a long time.

It was the hand. He could not stop thinking about the hand. Upright, narrow, entirely correct. He had seen it somewhere, quite recently, and quite often. He sat with his chin on his fist and let his mind go slack, the way one does with a name on the tip of the tongue, and presently, out of the dark, as clearly as if he were holding it, it came. Cream parchment. A clean red seal at the foot. A notice on a noticeboard, in a greenhouse, with its neat, polite, twice-repeated please and thank you.

The lamp ticked. Outside, the snow came down.

It was only a coincidence, of course. Half the Council wrote in that hand. It was the formal script of the Academy, taught to every clerk, and any competent copyist could have produced it. There was nothing in it. It meant nothing at all.

He wrote, beneath the card, in small neat letters: Coincidence?

He sat looking at the word for a very long time. Then he drew a single line through it, and closed the notebook, and put out the light.