The rules were Cassian's idea, which was appropriate, because the rules were exactly the kind of idea Cassian would have.

It was the sixth morning. She had counted. They had developed, over six mornings, a set of habits that were not discussed but were practiced: the tea before conversation, the working quiet in the mornings, the shared table at mealtimes, the particular rhythm of two people occupying the same space without either of them having explicitly agreed to make it work. She had moved her things from the room upstairs into the small set of habits downstairs, in the way that you moved into a place: not with boxes and decisions but with the accumulation of small acts of presence.

She had a drawer in the chest by the window. She had a cup on the shelf that was hers. She had a book on the nightstand that she was partway through reading, which was hers in the sense that she had started it and not finished it and expected it to be there when she went back.

Cassian produced the paper at breakfast.

He set it on the table beside her plate, which still had eggs on it, and folded his hands and waited while she picked it up and read it.

Four rules, in his handwriting, clear and even:

One: No entering each other's rooms without being invited. Two: No touching without permission. Three: No reading private journals or correspondence. Four: No lying about Afterglow.

She read them twice.

She thought about what it meant that he had written them down. You wrote things down when you were concerned that they would not be followed, or when you wanted a record of agreement, or when you were trying to name something in order to manage it. The rules were, she thought, his way of naming the proximity: here is the territory we are sharing, here are the lines within it, here is the agreement that makes the sharing possible.

What she thought, underneath that: the things you make rules against are the things you are afraid of. And a careful man making rules about touching and privacy and honesty was a careful man who had looked at the territory and seen specific dangers.

"You put them in order," she said. "No entering rooms first, then no touching."

"Yes," he said.

"You were concerned about the rooms more than the touching."

He looked at his plate. "I was concerned about both," he said.

She took the pen from her pocket, because she always had a pen, and she wrote her name under each rule in the space he had left at the bottom of the page. The gesture of co-authorship rather than mere agreement. Then she pushed the paper back across the table.

He read it. He picked up his own pen and signed his name.

"I have an addendum," she said.

He looked up.

She took the paper back and wrote at the bottom, in her own hand: No deciding things for the other person without asking them first.

She put it down again.

He looked at what she had written for a long time.

"That is not the same category as the others," he said.

"No," she said. "It is a different category. It is the rule that makes the others possible to keep." She looked at him. "The other rules are about space and honesty. This one is about agency. I am living in your space, I am helping with your project, I am operating on limited information in an unfamiliar world. I need to know that the decisions that affect me are mine to make."

He was quiet with the specific quality she had come to associate with things landing in ways he had not prepared for.

"Yes," he said, eventually. "That is fair."

He signed the addendum.

She looked at both their signatures and thought: this is how agreements become real. Not in the moment of initial consent but in the specificity of what you consent to, the particularity of it, the willingness to put your name on the details.

"No falling in love," she read, and stopped.

She had not read it on the first pass. She had missed it, somehow, or he had added it, and she went back to the bottom of the paper and there it was, below the addendum in smaller handwriting, his pen: No falling in love.

She looked up.

He was looking at the table.

She decided, after a moment, not to say anything about it directly. There were statements that responded better to being held than to being addressed, and this was one of them, she thought: a rule about a thing that only needed ruling against if it was possible, possibly already probable, a rule that a careful man had written in small handwriting below the official terms of the agreement because the careful man was not, whatever else he was, dishonest.

She set the paper on the table between them.

"We should work out a schedule," she said. "For examining the fragments on the list."

He looked up. Whatever had been on his face in the moment of the not-reading settled back into composure.

"Yes," he said. "The ring first. You have already read part of it. A second attempt with focused intention may yield more."

"And the archive?"

"I need to arrange access. My family's connection gives me some access, but the formal records require a letter of authorization." He paused. "Which will take time."

"And Elara Voss?"

He was quiet.

"I do not know whether approaching her directly is wise at this stage," he said. "She sent you the letter, or someone connected to her did. She knows you are here. I would prefer to know more before we meet her."

Mina thought about this. "She read the box," she said. "She saw the fragment. She came to look at it three weeks ago, which was before I arrived, which means she was watching your situation before anything changed. She had a reason to watch." She paused. "Who is she to you, other than someone you knew?"

He was quiet for longer than she had anticipated.

"We worked together," he said. "We understood the archive in similar ways. We disagreed about what to do with understanding." He set his pen down. "She has very particular views about Afterglow. About the right relationship between people and their futures. What is permissible and what is not."

"And your disagreement was about what you did," she said.

"And about what she believed should be done instead."

"Which was what?"

He looked at his hands. "She believed the future I saw could be altered from within the record, without erasing it. She believed the right intervention was to change the event rather than to remove the record entirely." His voice was very careful. "I disagreed."

"Why?"

"Because I had tried," he said. "And failed."

She absorbed this. "How long did she try to change your mind before you erased the Afterglow?"

"Several months."

"And then you erased it without telling her."

The pause was very long.

"Yes," he said.

She looked at him. "She was trying to help you," she said. "And you decided, unilaterally, to do the other thing."

His jaw was set in the way she had come to recognize as discomfort presenting itself as composure.

"Yes," he said.

She thought about the letter under the door and the single line of it and what it meant for a woman who had spent months trying to prevent a man from making a choice to then watch him make it anyway and spend five years living with the consequences, and then to find, through a fragment in a box, that there was a new element in the situation.

"She is not your enemy," she said.

"I know," he said.

"She is afraid of what you might do next."

"I know," he said again, and the repetition had a different quality: not the controlled agreement, but the one that came from genuinely, personally knowing.

She picked up the list from the worktable and scanned it. "Item four," she said. "The object in the locked section of the Bellgrave archive. Can we access it before the letter of authorization arrives?"

"Technically," he said. He did not seem pleased by this.

"Then we go this afternoon," she said. "Not to the official records. To the room you know how to get into that no one is supposed to know how to get into."

He looked at her.

"You knew about that," she said.

"I did not mention it."

"You did not need to," she said. "You are an archivist's son who has spent five years trying to trace something most people do not know exists. You know every unofficial route into every relevant building in this city." She looked at him steadily. "I am correct."

A pause.

"Yes," he said.

"Good," she said. "Then we go this afternoon."

He looked at the paper on the table between them. At both their signatures. At the small addition at the bottom in his hand.

He picked up the list.

"This afternoon," he agreed.

They finished breakfast and cleared the table and prepared for the day, and she went upstairs to her room, her room, the first door on the left, and she stood at the window for a moment and looked out at the street.

She thought about the rules and what they were for. She thought about the one at the bottom in smaller handwriting. She thought about careful men who wrote the things they were afraid of because not naming them was worse than naming them and hoping the name would make them manageable.

She thought: it will not.

She thought: but that is not a problem for today.

She took her coat from the hook and put it on, and in the pockets were the letters, and in her mind was the list, and downstairs the sound of Cassian moving through the shop was familiar enough now that she knew exactly where he was without looking.

She went downstairs.

He was already at the door.

He held it open for her, which he had not done the first time, and she went through, and they went out into the afternoon together, two people with a list and an afternoon and the specific forward momentum of a story that has found its thread and is beginning to follow it.

The door closed behind them.

On the table inside, the paper with four rules and one addendum and one very small addition sat in the afternoon light.

The ink was dry.

The afternoon was one of the best she had in Bellgrave.

She was not sure why, exactly, which was part of why it was good: it did not have a clear reason. They went back to the archive in the afternoon, using the unofficial door, and she read two more items in the cabinet and found nothing new in them, and then they walked back along the river instead of through the streets, which was a longer route that Cassian did not explain and she did not ask about, and the river in the afternoon was extraordinary, wide and slow and reflecting the sky in segments separated by the shadows of the bridges.

She stopped on one of the bridges and looked at the river.

Cassian stopped beside her.

"How long have you lived in this city?" she said.

"My whole life," he said. "Except four years in the southern archive district when I was in my training."

"Do you still see it?" she said. "The way I see it."

He looked at the river. "Sometimes," he said. "When something changes. When the light is different, or when I am with someone who sees it for the first time." He paused. "Less often than I would like."

She thought about this. About the way familiarity was both a gift and a cost: you stopped seeing the extraordinary thing you lived inside because you had lived inside it long enough that it became background. She thought about Agnes's bookshop and how she had grown up in it and stopped seeing it until she was older and then saw it again with both the childhood memory and the adult understanding layered together.

She thought about the river in the afternoon light and how she would be able to see it like this, with this quality of newness, for only a limited time before it became familiar to her too.

She thought: I want to be here long enough for it to become familiar.

She did not examine this thought too carefully. It was the kind of thought that needed to be held lightly, like a bird in cupped hands.

"Tell me something," she said. "About this city that a visitor would not know."

He looked at the river for a moment.

"The bridge we are standing on," he said, "was built twice. The original was destroyed in a flood three hundred years ago. The city rebuilt it exactly as it was, same stone, same measurements, same decorative work on the parapets, because the original architect had designed it to stand for a thousand years and they considered themselves obligated to finish the thousand years on his behalf." He paused. "The architect was dead by the time it was rebuilt. But the city felt they owed him the completion of the project."

She looked at the bridge, at the old stone under her hands.

"That is a beautiful thing to do," she said.

"Yes," he said.

She looked at the river and at the stone and at the afternoon, and then she looked at him, and she thought about a city that rebuilds a dead architect's bridge because they feel they owe him the completion of his work, and she thought about what that said about the relationship between a person and their creation, about whether you could continue a thing after the person who made it was gone, about whether Agnes's work was done or whether it was still being completed.

She thought it was still being completed.

She thought she might be the completion of it.

"Come on," she said. "We still have three items on the list."

He fell into step beside her, and they walked off the bridge and back toward the part of the city she was learning, and the afternoon was good in the particular way of afternoons that did not have a clear reason to be good but were anyway, and she was beginning to understand that this was the kind of afternoon she had been failing to write, the kind that happened between the events, in the spaces where life was simply life and not plot.

She was going to write about this afternoon someday.

She was going to write it well.

In the evening, after they had worked through two more items on the list and eaten dinner in the kitchen with the window open to the cooler air coming off the street, she sat in the shop in the lamplight with the leather-bound book and wrote for two hours. Not about Cassian, not about the case, not about Afterglow: about her novel, about the character who had been standing at the end of three hundred pages waiting for an ending.

She wrote the ending.

Not the whole thing: the first version of it, which was not the final version but was the shape of it, the through-line, the thing the story had been building toward all along and that she had not been able to see until she was standing in a city she had never heard of ten days ago and was beginning to understand that the endings she could not write were the endings she had not yet lived.

She wrote until the lamp burned low and then she closed the book.

She looked at the room around her.

Cassian was at the worktable, still, with the small lamp on, bent over something he was examining, and she could see the back of his head and the set of his shoulders and the careful quality of his hands, and she thought: I am going to finish this novel.

She thought: I am going to finish a great number of things.

She went upstairs.

She lay in the dark and thought about the bridge that had been rebuilt twice, and the architect who never saw it completed, and the city that felt obligated to finish what had been started.

She thought: Agnes started something.

She thought: I am going to finish it.

She fell asleep on this thought, which felt less like an ending and more like a beginning, which was, she was learning, how the best endings felt from the inside: not like stopping but like arriving.

She arrived.

She slept.

The evening after the bridge she did something she had not done since arriving in Bellgrave: she wrote to Clara.

Not a real letter, because she had no way to send one, and no paper of the right kind, and Clara was in a world she could not currently reach. But she wrote as though she were writing to Clara, in the leather-bound book, in the register she would have used if Clara had been reachable: direct, warm, slightly comic, the version of herself she was when she was most herself.

She wrote: Clara, I am in a city you have never heard of and I can tell you that the pastries here are extraordinary and the magic is real and I have been reading futures with my hands for ten days and I have not once missed my phone, which might be the most surprising thing I have to report.

She wrote: There is a person here. I will not describe him because the description would be inadequate and because you would ask questions I am not ready to answer. I will say only that he is the kind of person who rebuilds things and does not say he is doing it, and that I find this specific quality extremely difficult to look directly at.

She wrote: The novel has an ending now. I know what it is. I will tell you when I see you, which I expect will happen eventually, although I cannot currently predict the timeline.

She wrote: I am fine. Better than fine. I am, I think, in the middle of something that matters. I will explain when I can.

She closed the book.

She sat in the lamplight of the shop and thought about Clara and about the voice messages and about the agency email she had still not answered, and she thought about what she would say when she got back, which she was now thinking of as when rather than if, which was its own kind of progress.

She would say: I finished it.

She would say: I had to go somewhere else to understand it, but I finished it.

She would say: the ending was always there. I was looking for it in the wrong world.

She thought about that sentence, the one she had written in Agnes's book on the first night, and she thought about how it had not meant what she thought it meant, or rather it had meant more than she thought: not just about the novel but about everything she had been looking for and looking for in the wrong place, the wrong register, the wrong direction.

She looked up.

Cassian was watching her from the worktable, in the way she now knew was not the analytical look but the other kind, the one she had been building a vocabulary for one word at a time, and tonight she had a new word for it: fond. Not yet. Almost. The almost-fond look. The look of a person who is very close to something and is being very careful about the final distance.

She looked back at him.

She did not look away first.

He did.

She picked up her pen and wrote one more line in the book: He looked away first tonight.

She closed it.

She went upstairs.

She thought: that is information.

She thought: I know what to do with that.

She did not do anything with it tonight. Tonight she slept.

Tomorrow there would be time.

There was, she had decided, more time than she had been treating this as though there was. The story was long. The middle was long. She was good at the middle.

She could afford to let it be long.

She slept.