The Quiet Annex lay at the far end of the Academy library, down a narrow passage behind the botany stacks, and it had been warded for silence four centuries ago by a headmaster who had plainly never enjoyed a conversation. The wards were gentle but absolute. Speak above a murmur and the green-shaded lamps along the tables dimmed in reproach. Laugh, and they went out altogether, and a small brass bell rang somewhere in the ceiling to summon the librarian.

Alan loved it. He had loved it from the first afternoon, when he had walked in, listened to the silence settle over him like a warm coat, and thought, with the quiet satisfaction of a man finding his own handwriting on a wall: here.

He arrived at ten minutes to nine on Saturday morning, which was ten minutes before the hour they had agreed on, and which he considered the minimum courtesy.

The Academy on a Saturday was a different animal. Classes were done for the week, and from the courtyard below the annex windows rose the noise of everything the timetable did not allow: the Dueling Society drilling on the flagstones, a choir rehearsing something with too many sopranos, a cluster of first-years quarreling over the rights to a sunny bench. Pip had left at eight with a scroll under his arm, bound for the Rumor Society, which met in a boot cupboard and, as far as Alan could tell, existed to produce rumors about itself. Alan had not asked. He had eaten a quiet breakfast, collected his folders, and walked to the annex through a school at play with the air of a man crossing a field in a light drizzle.

He chose the long table by the west window, where the light was good, and laid out his materials. Three folders. Each was labeled in his upright hand, and each was tied with a colored ribbon according to a system he had devised in his last year of preparatory study: green for cases with clear and consistent documentation, yellow for cases with gaps, red for cases in which the sources contradicted one another. Two were green. One was yellow. He had thrown out the red ones at the start, on the principle that a case one could not trust was not a case at all.

The Harrow Bridge Collapse. The Lantern Row Miscasting. The Pell Orchard Frost.

He read the three summaries once more, squared the edges of the folders against the table, and sat down to wait.

At nine o'clock, she was not there. At a quarter past, she was not there. At twenty-five past, he had finished rereading all three folders and was beginning to compose, in his head, a measured and entirely civil note to the professor concerning the division of labor in joint projects. At twenty to ten he decided that he would begin without her, and was surprised to find that the decision did not give him the satisfaction he had expected.

At nineteen minutes to ten, the door of the annex banged open.

It did not open. It banged, with the force of a person who has put her shoulder into it in the confident belief that the door would not mind. Every lamp along the table flickered at once and fell to a dull amber glow. Somewhere in the ceiling, the brass bell gave a single reproachful tink.

"Sorry!" said Elen Joy, in a whisper that was very nearly a shout. "Sorry, sorry, sorry!"

She came down the aisle at a half run, scarf streaming, a paper bag clutched under one arm and a steaming cup in each hand, and the lamps dimmed in front of her like a congregation bowing. She skidded to a stop at the table, set both cups down with the extreme care of someone who had been carrying them very fast, and pressed a hand to her chest, trying to breathe quietly. It was not a success. The lamps went from amber to a deep sullen brown.

"I'm so late," she said, softer. "I know. I'm awful. I had a plan. I had an alarm, a literal alarm, I enchanted a pebble to scream, and then I got held up at the market, and it all just. Anyway." She spread her hands, one of them still smudged to the wrist with ink. "I brought bribes."

"I do not accept bribes."

"These are very good bribes." She pushed one of the cups across the table until it stopped against his folder. "Spiced apple. There's a lady at the market who does it with extra cinnamon if you ask her nicely, and I always ask her nicely. And there are almond twists." The paper bag crackled. "Fresh. They're still warm."

Alan looked at the cup. A thin curl of steam rose from it, and with it the smell: warm apples, clove, bark, a sweetness like the inside of a kitchen on a winter evening. It was extraordinarily distracting.

"You are forty minutes late," he said.

"Forty-one, I think."

"I do not drink during study."

"It's apple. It isn't firewater." She dropped into the chair opposite him, tucked one foot under herself, and looked at him with her chin in her hand. There was no apology in her face, exactly. There was something that looked a good deal like hope, wide-eyed and unguarded, that he might not stay angry. "I really am sorry. Truly. I hate being late. I'm just bad at stopping."

"At stopping what?"

"Anything," said Elen. "If something looks interesting, I follow it, and then it's lunchtime."

He should have said something severe. He had the sentence ready. He heard himself say instead, "I'm not angry. I'm calculating."

"Calculating what?"

"How much of the morning remains."

"Oh, plenty," said Elen cheerfully, and took a twist out of the bag and bit into it, and the lamps brightened a very little, as though even they had forgiven her.

"We should begin," Alan said. "We have until the end of the month, and there are three suitable cases."

He slid the folders across. She wiped her fingers on her scarf, which he watched with something like grief, and opened the first.

"You really did homework," she said.

"It is a joint paper."

"No, I mean, you did this." She turned a page. "You've color-coded them."

"Green for consistent. Yellow for gaps."

"And in the margin, here, you've written the weakest link. Every single one. 'Eyewitness Pryor contradicts the guild ledger on timing.' 'Source for the second spell untraceable.'" She looked up, genuinely astonished. "Nobody does that. Nobody tells you where the argument is going to break before they've even started."

"If an argument has a weak point, it is better to find it first."

"Yes!" She said it so loudly that the lamps guttered, and she clapped a hand over her mouth, eyes dancing above it. "Yes," she whispered through her fingers. "That's exactly right. That's what I always say. I just don't have a system for it, I have a pile."

He did not know what to say to that. He found that he was straightening the nearest folder, which was already straight.

She read quickly. That was the second surprise. He had expected a leaf-through, a skim, an impatient tap of the pencil. Instead she read the way she had read the textbook in the lecture hall, bent over the page with her whole attention, her lips moving very slightly, turning pages at a steady speed that meant she was taking in every line. Every so often she stopped and asked a question, and the questions were not the questions of a person who was bored. Why had the Harrow builders ignored the surveyor's warning? Who had signed the inspection? Had anyone ever discovered whether the Pell frost was natural or cast? Twice she asked something he could not answer from the folder, and he found himself leaning forward over the table to look it up.

By the time she closed the second folder, forty minutes had passed and the lamps had settled into a cooperative glow.

"Well?" said Alan. "Which one?"

"I don't like any of them."

He stared at her.

"Harrow Bridge is a nothing," she said, with the airy certainty of someone declaring the weather. "The builder was lazy, the inspector was lazy, the bridge fell down. That isn't a case where intention and consequence diverged, that's a case where somebody didn't try. Nobody wanted the bridge to fall. Nobody wanted it to hold, either. It's just negligence. It's dull."

"It is well documented."

"It's well documented because it's dull!" She leaned across the table. "The prompt says a case where intention and consequence come apart. Where someone meant to do one thing and something else happened. Where you really have to argue about who was right. Harrow Bridge doesn't have a single person in it you'd want to argue about."

He opened his mouth and found, to his irritation, that she was correct. He closed it again.

"What would you suggest?" he said, in a voice he hoped sounded neutral.

Her face lit like a lamp.

"The Alder Street Threadmending."

He knew the case. Everyone at the Academy knew it, or knew of it. A healer in a small city, forty years ago, who had used a forbidden spell to save a dying child, and the spell had worked, and the next day two other patients had died of a side effect no one had known to expect. The spell had been struck from every curriculum since.

"It is a prohibited spell," he said.

"Of course it's a prohibited spell, that's the whole point."

"The primary sources are in the Closed Stacks."

"I know."

"Which require a faculty slip."

"I know." She was practically bouncing in her chair. "And the slip needs a stated reason. Last time I asked for the restricted shelf they said, 'On what grounds?' and I said, 'To find out why it's restricted,' and they gave me a note for my file." She said this without any particular distress, as one mentions an unfortunate haircut. "But this is a reason! It's an assignment! We have a signed paper to write!"

"No," said Alan.

"Why not?"

"Because the Closed Stacks are closed for a reason."

"What reason?"

"I do not know. That is the point. Someone who has studied the matter far longer than either of us has decided that students should not have the material, and I see no grounds on which to overrule them."

The lamps dimmed, though neither of them had raised a voice. It was the quality of the silence between them, he thought, that did it. Elen sat back slowly and looked at him with her head tilted, studying him the way she had studied the page.

"Do you always do what you're told?" she asked.

It was not said in mockery. That was what unsettled him. It was curiosity, plain and open, the kind a person has about an unfamiliar sort of animal.

"When it is reasonable," said Alan.

"Who decides what's reasonable?"

"Those who have studied the consequences."

"And who decides they studied them right?"

"That is what a charter is for."

"Charters are written by people."

"Yes," said Alan. "Which is why they are better than the alternative. If everyone decided for themselves what was reasonable, no rule would ever hold. And a person who breaks the rules whenever he finds them inconvenient is not a person anyone can rely on."

He heard it as it left his mouth. It was not unkind. It was, in his mind, a mild observation, a statement of simple logic, the kind of thing his father said at dinner without lowering his fork. But something moved across Elen's face as he said it. It was tiny, no more than a flicker, the way a candle flinches in a draft. Her smile did not vanish. It stayed exactly where it was. But for the length of a heartbeat it was the smile of someone holding a door shut with her shoulder.

"Right," she said lightly. "Fair enough."

She reached for the nearest book on the table, an old green volume of the Potioneers' Guild case records that had been lying under the folders, and at the same instant Alan, who had been about to move it out of the way, reached for it too.

Their hands met on the spine.

It was nothing. A brush of fingers, the warm side of her hand against the back of his, ink and dust and the faint dry heat of someone who was always slightly too warm. It lasted less than a second. She snatched her hand away as though the book had bitten her and laughed, and the laugh was a fraction too quick, a fraction too bright, and not quite the laugh he had heard in the courtyard.

"Sorry," she said. "You take it. Please."

He took it. He set it down very carefully in front of him, with both hands, and did not look at the hand that had touched hers. He did not look at her at all. He looked at the book's spine, where a title in cracked gold read Notable Cases of the Guild, and an idea, from nowhere, surfaced in his mind.

"There is another case," he said slowly.

She looked up.

"It's in the open stacks. Third shelf, west wall." He opened the green volume without having decided to, and turned its pages to the middle, where a long entry sat under a heading he had read once, years ago, and disliked ever since. "The Marrowfield Cauldron Fire."

She leaned in to see. He angled the book so she could.

"Marrowfield was a village in the north," he said. "Eighty years ago the well was poisoned by runoff from a mine. The Ministry's protocol required three days of assessment before any antidote could be dispensed, because unreviewed compounds can kill. A potioneer in the village, Hesper Vane, did not wait. She brewed an unapproved antidote overnight in the village cauldron, and gave it to every household before dawn."

"Did it work?"

"It worked. Two hundred people lived who would otherwise have died." He turned the page. "The cauldron cracked on the third batch and set her workshop on fire. It burned to the ground. And the Ministry stripped her of her license for ten years for breaking procedure."

Elen was very quiet.

"Intention," Alan said, "good. Consequence, mixed. Procedure, broken. I have disliked the case since the first time I read it, and I have never been able to explain why. I believe that is what the professor means."

She was looking at him. It was a different look from the one she had worn all morning. It was surprised, and a little warm, and very attentive, as though he had just revealed a door in a wall she had been leaning against.

"You'd take the procedure side," she said.

"Of course."

"And I'd take the intention."

"I expect so."

"Then we write both." She grinned, and the dimple arrived like a lit match. "A duel! On paper! Oh, that's good, Alan, that's really good."

He had never heard her say his name. She had called him lifesaver, and you, and nothing else. It landed in him like a stone dropped into still water.

"What?" she said. "Is that wrong? It's on the seating chart, A. Valemont. I looked. What's the A?"

"Alan," he said.

"Alan." She tasted it. "Alan Valemont. It sounds like a very serious clock."

"It is a family name."

"I like it. It suits you." She held out her hand across the table, ink on the knuckles, palm open. "Elen Joy. Not Miss. Miss makes me feel like I'm in trouble."

"You are frequently in trouble."

"Which is why it makes me feel that way."

He looked at the hand for what felt like a long time, and then he took it. It was warm and a little rough and exactly as strong as it looked. They shook once, formally, as if signing a treaty, and the lamps along the table brightened all together, as though the annex itself approved.

"One condition," said Alan, letting go.

"Anything."

"We do this properly. Sources logged. Quotations cited. A proper bibliography."

"Footnotes," said Elen, with the expression of someone agreeing to eat a vegetable. "I hate footnotes."

"Yes."

"I'll use them out of love."

"Out of procedure."

"Out of procedure," she agreed solemnly, and bit into her second almond twist.

They worked until the noon bell.

It was a strange discovery, how well it went. He built the structure: a timeline of the Marrowfield events, a table of the Ministry regulations that applied, a list of the arguments each side would need to make. She filled the margins. She asked what the village had eaten, whether the mine runoff had a smell, how long a cauldron of that size took to heat. She scribbled a diagram of the antidote's probable ingredients in the corner of a page and then, without a word, drew a small neat line from one to another and wrote WHY HERE? in capitals, and he found, a few minutes later, that he had gone to fetch a reference book to answer it. When she was thinking, she hummed. When the humming rose above a murmur, the lamps dimmed, and she would stop and look up at them with an expression of such comic guilt that he had to bend lower over his notes.

At one point she drew a small cartoon of a Ministry assessor, a stout figure with an enormous pen standing in the middle of a burning village saying MEETING SCHEDULED FOR TUESDAY, and slid it across the table without a word. He looked at it. Something happened in his chest and his throat, a small, unfamiliar, sudden contraction, and a sound came out of him that was not quite a cough.

The lamps flickered.

Elen's head came up like a deer's.

"Was that a laugh?"

"No."

"That was a laugh. Alan Valemont laughed."

"I cleared my throat."

"You laughed at my assessor!" She was radiant. She was whispering, because the lamps were still watching, but it was the loudest whisper he had ever heard. "I'm putting it on the calendar. First laugh, on a Saturday, in the Quiet Annex. I'll get a plaque."

"I laugh," said Alan with dignity.

"When?"

"Occasionally."

"Name one."

He opened his mouth. He closed it. He found that he could not, on short notice, produce a single example, and the realization was so absurd that his mouth twitched, and she saw it, and pointed at him with her pencil in triumph.

"I'll get you to laugh properly before this project is done," she said. "A real one. Out loud. I'll bet you a bun."

"I do not gamble."

"Then I'll just do it for free."

At noon the great bell in the west tower rang, and the lamps all glowed in unison, which was how the annex announced the hour, and Elen stretched until her joints cracked and flopped back in her chair with a groan.

"You're not as scary as you look," she said.

"I am not scary."

"You glared at me for the entire first week like I'd set fire to your homework."

"I did not glare."

"A little glare." She held up two fingers a hair apart. "Just a tiny one. The kind a very polite fortress gives you."

"My face is simply arranged this way."

"It's a very good arrangement," said Elen, quite seriously. "It's just a lot of wall."

He did not know what to say to that. He sat holding a pen, and for a moment, in the golden quiet of the annex with the lamps shining and the sound of the Saturday courtyard muffled far away, he thought of the word in his notebook. Closed. It had seemed so final when he wrote it, in small neat letters, under the three rules. It occurred to him now, with a faint dizzy sensation, as of missing a stair, that a thing could only be closed if it had a door, and that he had never actually checked whether it had a lock.

Do not look. Do not ask. Do not hope.

He had broken the first twice since breakfast and was fairly sure the second was in jeopardy.

It was only the work, he told himself. A joint paper. Anyone would be affected by a collaborator that quick.

He gathered the folders and tied the ribbons. She swept her scattered pages into a bundle and stuffed them into her bag, along with the empty paper sack and her own cup. He looked down. His cup, which he did not remember touching, sat empty at his elbow, and had been for some time.

The courtyard at noon was a gold-and-white riot of weekend. The Dueling Society had been joined by a drumming circle and what appeared to be a small and very serious argument between three first-years and a goose. Elen walked beside him as far as the iron gate, talking about footnotes in the tone of someone discussing a dental procedure, and at the fork in the path where the east cloister turned away from the girls' wing, she stopped.

"I should go," she said. "I've got to be at the greenhouse by one. The mint won't wait."

"Of course."

"Thank you. For the case. For the system, and the ribbons." She hitched her bag higher on her shoulder. She was looking at him with her head tilted and a very odd expression, bright and sure and slightly shy, as if she were about to say something and had decided against it, and then decided for it again. "Alan."

"Yes?"

"I've decided about you."

He blinked. "Decided what?"

"I'll tell you Monday!"

"Miss Joy."

"Elen!"

"Elen," said Alan, helplessly, "what have you decided?"

But she was already walking backward down the path, scarf flying, hand raised in a wave, grinning so widely that the dimple had gone deep into her cheek. "Monday!" she called. "Bring the bibliography!" Then she turned and ran, and the crowd swallowed the flash of red, and he was left standing at the fork in the path with a stack of folders under one arm and a single empty cup in his hand, listening to his own heartbeat doing something that no article of the charter had prepared him for.