She had thought, all summer, that the difficult part of returning would be the building.

It was not the building. The building had been waiting. The building had, in the way of buildings that know themselves, made itself precisely the right shape to receive her — the gates already open at nine, the avenue's lime trees holding their late-September gold, the front door ajar in the manner of a door that had been ajar for her in particular. Maren got out of the taxi with her case in one hand and her notebook in the other and stood in the gravel for a moment and felt the specific way Thornwick recognized her, which was the same way it had recognized her last September and was also entirely different, because last September she had not known what it was doing.

The difficult part, she discovered as she stepped under the lintel, was the cohort.

There were twelve new women in the Receiving Hall. Twelve cream-colored letters had been opened across the world in July, and the women who had opened them had, all of them, said yes, and the car had collected them at the village green at nine o'clock that morning, and now they were standing in a slight semicircle in front of the fireplace with twelve cups of tea and twelve faces doing the precise, particular thing that faces did at Thornwick on the first morning, which was to look as though something extraordinary had just begun and they were not yet allowed to know what.

Maren stopped at the threshold.

She had not, she realized, prepared for this.

She had prepared for Rowan — they had, in fact, prepared for Rowan together, in Rowan's kitchen on the Black Isle, two weeks ago, in a long kind conversation about how they would behave in the building during the term. She had prepared for the new room (three beds, smaller, hers and Sable's and Blythe's, with a window the dormitory steward had assured her would be calmer than last year's). She had prepared for the Top Floor key, which Isolde was going to give her in the third week, although Maren did not yet know that. She had prepared, with the kind of considered attention she had spent the summer learning, for being a person who lived at Thornwick now.

She had not prepared for being on the other side of the welcome.

The Headmistress was at the fireplace. She poured tea into twelve cups with the practiced ease of someone who had never in her life used a teabag. Her hair was the same dark navy of her dress, which was also, Maren noticed for the first time, a faint kind of optical signal — Elowen Thornehill at first arrival was always in dark colors and always poured tea, and the new students were always in their faintly-too-formal travel coats with their faintly-too-careful expressions, and the room smelled, as it had smelled last September, of beeswax and old paper and that floral note that changed with the season.

This year the floral note was the autumn one. Honeyed, dry, slightly resinous — the smell of a wreath.

Last year Maren had not known what to call it. This year she did.

She crossed the Hall behind the cohort, quietly, the way she had seen Rowan cross the Hall behind her own cohort a year ago. She moved along the wall, past the portraits — who clocked her with the faint settling of long-acquainted figures recognizing a returning face — and came to a stop near the door that led out toward the South Wing.

A small movement to her left. She turned her head.

A woman was standing two paces from her, also against the wall, also watching the new cohort with the expression of someone who had been on this side last year and was finding it exactly as strange as she had suspected it would be. She was perhaps thirty-four. She had quietly graceful posture and the particular still-eyed attention of someone who had spent a great deal of her adult life looking at her own children and had learned to look at adults the same way.

She glanced at Maren.

Maren glanced back.

They did not speak. They were not in a place where speaking was required.

After a moment the woman returned her attention to the fireplace. After a moment Maren did the same. The Headmistress was finishing her welcoming sentences, her grey eyes moving down the row of new arrivals with the indexing quality that Maren had not quite forgotten and had not been able to articulate, last year, to anyone.

She was articulating it now, in her own head, watching it happen to the others.

Indexing, she thought. That is the word for what she does.

Welcome, Maren thought, to the row of women she had never met. Welcome to the place that has decided you. We will explain what we can. The rest you will learn as you go. This is, after all, a school.

The Headmistress finished the sentence. The room arranged itself to have heard it. The tea steamed in the firelight. The portraits resumed their official poses.

The woman beside Maren — who was not yet Hen Maguire to her, who was simply the woman against the wall — said, very quietly, without turning her head: "Are we allowed to be here?"

"Yes," Maren said. "But we shouldn't speak. That's the rule of the first morning."

"How do you know?"

"I was here last year."

"Oh." A small breath, processed. "Were you against the wall?"

"I was at the fireplace."

"Was someone against the wall watching you?"

Maren took a moment. She had not, last year, looked at the wall.

"Probably," she said.

The woman seemed to accept this with the quiet satisfaction of someone who had expected the answer. She did not speak again. After another moment, when the cohort began to be moved by the Headmistress toward the dormitory stair, the woman against the wall stepped back through the door behind her and was, in the way of people at Thornwick, gone.

Maren stayed at the threshold a little longer.

The Headmistress, halfway up the stair with twelve trailing cohort, did not turn her head. But she lifted her free hand slightly, in the air, in a small gesture of formal acknowledgement that meant — Maren had learned to read it — I see you are here. We will speak later. Not now.

Maren bowed, fractionally, the way one did, and went.

* * *

The South Wing was different from the dormitories. The dormitories were above the Receiving Hall, six to a room initially, two or three to a room as you advanced, a particular smell of new students and old paper and wool sweaters drying. The South Wing was — the building's preferred phrase — for those who lived here.

It was reached by a stone corridor that ran south from the back of the kitchens, past a series of small private studies that the Year Two students could request for reading, and ended in a courtyard that had been there in some form since the 1740s and still contained the original well. Beyond the courtyard, a heavy oak door. Beyond the door, a stair. At the top of the stair, a corridor of ten doors. Six were faculty rooms. Four were rooms allocated, by the Headmistress's discretion, to whichever Year Twos had reasons to be there.

This year three were occupied: one by Niamh, who had needed quiet for her Cecily visits, although the Headmistress had not specified this in the assignment letter; one by Petra Chen, whose work on her novel required a writing room with a door that locked; and one by Maren.

The fourth was unassigned. Or — Maren had begun to suspect, when she walked the corridor for the first time in August — the fourth was occasionally Rowan's, when Rowan needed it.

She did not ask.

She went to her own door. It was the third on the left. Her name had been written, in the rose-dark ink that she had now memorized like a language, on a small card slid into a brass holder beside the lintel: M. Ellis. Last year her name had been on a piece of paper taped to a dormitory wardrobe.

She stood for a moment with her hand on the brass.

Then she opened the door, and her room was exactly the room she had last seen at the end of August, which was also exactly the room she had not been able to imagine herself in until she opened the door now and was, immediately, in it.

A single bed in the corner under a window. A writing desk under the other window. A small fireplace, currently unlit. A chair pulled up to the desk that had a cushion someone had clearly chosen for the chair specifically. A bookshelf, mostly empty. A door to a small bathroom she had not had to share with anyone last year and would not have to share with anyone this year.

There was, on the desk, a saucer with a key on it. The key was small, brass, modern, and had a paper tag tied to its ring. The tag read, in the Headmistress's handwriting:

Welcome back. The South Wing locks; you will want the key. We will speak after the new cohort have been Mapped — Friday week, perhaps. — E.T.

Maren picked up the key. The brass was warm.

She set her case on the bed. She set her notebook on the desk. She crossed to the window and stood there looking out at the courtyard well and the slope of moor beyond and the very particular September light that the South Wing got at ten in the morning, which was the light that had made her decide, in August, to take the room.

The light fell on the desk in a long pale rectangle.

Her notebook, where she had put it, was inside the rectangle.

She stood at the window for what might have been a minute or might have been ten and watched the rectangle of light.

She thought: I live here.

She thought: I have lived here for less than a year.

She thought: The building has known me longer than that.

She thought: The fourth door is Rowan's when she needs it.

She thought, finally, with the small specific clarity that the South Wing's light produced in her: we have to be careful this year.

There was a knock at her door. A specific knock — three soft, then a brief pause, then one slightly louder. Not Rowan's knock, which was two and one. Sable's knock.

"Come in."

The door opened. Sable Morrison stood in it, in a charcoal coat that was even more expensive than the one Maren had first met her in, with her case at her feet and her hair in a knot that suggested she had done it on a train.

"You're up here," Sable said. "I wasn't sure they'd actually given it to you."

"They did."

"Good." Sable looked at the room, indexed it in approximately four seconds, and clocked the brass key on the desk. "Mine's downstairs. Blythe's downstairs. We're together."

"I know."

"You'll come down, though."

"I'll come down constantly. The South Wing is too quiet for any of us to sit alone in for long."

"Good." Sable did not move from the doorway. She was looking at Maren the way she looked at people in certain meetings — fully, briefly, with a clinical clarity that always meant she was about to say something the rest of the room did not yet realize was true. "How are you."

"Good."

"I'm asking the real question."

Maren turned from the window.

"I'm good," she said again, and meant it the second time. "Tired from the train. Glad to be back. A little disturbed by being on the other side of the Receiving Hall this morning. Mostly good."

"And Rowan."

"Mostly good."

Sable nodded once. She did not require more, which was one of the things Maren loved about her.

"Greave," Maren said. "How is — "

"I haven't been in," Sable said, too quickly. "I'm starting tomorrow."

"All right."

"It will be fine."

"All right."

Sable did not move from the doorway. She stood there, briefly, in the way of someone who wanted to say something else and could not yet name it.

After a moment she said: "Tea."

"Tea."

"In the kitchen. Now. Blythe is already there. She has been there for an hour. She brought a particular kind of biscuit from Nashville that we are required to try."

"Lead on."

They left the South Wing together, Maren locking the door behind her with the brass key, the key warm again in her palm in the way Thornwick's metal was always slightly warm, and as they walked down the stone corridor past the small private studies Maren said, casually, to the air:

"I was at the wall this morning."

"What wall."

"The Receiving Hall wall. Watching the new cohort."

A beat. Sable, beside her, slowed by perhaps half a step.

"Oh," Sable said. "How was that."

"It was the strangest thing that's happened to me this year."

"It's only the first day."

"I am aware."

They walked the rest of the corridor in companionable silence.

In the kitchen, Blythe had laid out three cups of tea, a tin of biscuits, a small saucer of honey she had requested specifically from the Refectory, and a pile of letters that had arrived for the three of them over the summer and been kept in the dormitory steward's office. She looked up when they came in, her hair pulled into a Nashville knot that could not have looked less like Sable's, her smile already at full capacity.

"Y'all are late," she said. "I have already eaten three of these biscuits and developed a theory about the Headmistress's coat."

"Tell us the theory."

"It's the same coat as last year but it's taken on weather," Blythe said. "Like the building. Like the courtyard well in winter. I think she lets her coat live here when she's not wearing it."

"That's — " Maren considered. "That is probably the case."

"Right? Sit down. Drink this. Tell me everything about the South Wing. I'm planning to never leave Room Three but I want to know what we're not in."

They sat. They drank. They told each other the small first-day things. Maren did not, for the first hour, mention the woman against the wall. She would, in a week's time, when Hen Maguire approached her in the library with a question about a half-remembered Browning poem, recognize the face and feel the small specific click of a person becoming a named person. She would, for the rest of her life, remember the exact cadence of the first thing Hen had said to her: Are we allowed to be here?

She would, for the rest of her life, remember her own answer.

Yes. But we shouldn't speak. That's the rule of the first morning.

It was, as it turned out, the rule of many of the mornings.

* * *