The east wing collection logs were exactly where Cassian had said they would be.

They spent the morning in the east wing — properly, in full daylight, with Cassian's key and Cassian's presence and nothing clandestine about it. The documentation cabinet was a tall piece of fitted furniture along the north wall, its drawers labeled in the precise notation system that Seraphine now recognized as the shared language of this research program: dates, specimen identifiers, measurement records, the accumulated paper record of work done carefully over a long period.

The collection logs were in the third drawer.

They were as Evelise had predicted they would be — systematic, detailed, damning. Twenty-three sessions of concentrated light transfer into the east wing collection glass, beginning approximately six months before Lady Oriane's death and continuing until three weeks before Evelise's. The dates, the duration, the recorded output levels. The handwriting was Halewick's for the first two years and Voss's for the modifications after, but the methodology was continuous, a single program executed by two people over an extended period.

The final entry was dated three days before Evelise's death.

Seraphine photographed every page with the botanical documentation camera she had brought from her work kit, because she had learned that original documents needed to stay where they were found and that copies were what allowed information to travel. Cassian stood beside her and held the lamp at the correct angle without being asked, which was how they had learned to work together in a month — each aware of what the other needed before it was requested.

They catalogued everything methodically and replaced everything precisely and left the east wing in the condition they had found it, because disturbing the evidence before they had a plan for using it was the kind of mistake that Evelise had not had the chance to avoid making. They would not repeat it.

Afterward they went to the main section of the conservatory and Seraphine went back to her restoration work because the work needed to be done and because the act of doing something real with her hands helped her think. Cassian stayed, which he did sometimes now — not always, but sometimes, present in the conservatory while she worked in the way of someone who had decided that the space was one he could be in without it being transactional.

Rowan was working on the upper mirror housing in the central vault — the highest point of the conservatory's main section, approximately twenty feet above the floor, accessible via the fixed iron ladder that ran up the inner face of the stone wall. He worked with the focus of someone for whom heights had never been interesting enough to be frightening, his tool case clipped to his belt, his movements efficient and unhurried.

Seraphine was deep in the root mapping of the fourth specimen when she heard the sound.

It was not a loud sound. That was the first thing — the specific quality of a metal sound that was not a bang but a series of smaller sounds, the acoustic signature of a joining that had been under stress and was now failing incrementally. She had grown up in a nursery, in a space full of metal frames and glass panels and the occasional catastrophic failure of aging materials, and she knew this sound the way she knew the sound of certain wind conditions on glass: as a warning, specific, requiring immediate response.

She looked up.

The large panel in the upper vault — the one Rowan had flagged in his initial assessment as requiring attention, the one that had been added to the work list for next week — was moving. Not much. Not in a way that a casual observer would have noticed. But she was not a casual observer, and she could see the plane of the glass shifting fractionally from its frame at the upper right corner, where the secondary bracket had been developing the stress fracture that Rowan had identified.

The bracket failed.

The sound of it was clean and final — the sound of metal releasing from its intended position — and the panel, perhaps two feet by three feet of thick conservatory glass, began its fall along the trajectory that physics required, which was directly downward, toward the floor of the conservatory, toward the planting beds and the root mapping materials and the specific area of stone floor where Seraphine was crouching.

She heard it and she stood and she moved backward — one step, two — but the angle was wrong and she was calculating even as she moved and she knew before she finished calculating that two steps was not sufficient.

Then something happened faster than she had time to process.

The sound of footsteps was not from behind her but from the side — from the section of conservatory where the planting beds were highest, where the path curved around a set of specimen troughs that had always seemed to her to be poorly placed for navigation. No one ran around those troughs. The path went around. But what arrived at her left side in the two seconds between the bracket's failure and the panel's arrival at floor level did not come from the path.

Cassian was there.

Not between her and the panel — there was not time for that geometry. He was to her left and slightly in front, and what he did was not precisely a physical interception but something more angular: he stepped into the space between her and the direction from which the largest fragment would travel after the primary impact, and he held his arm across in front of her at shoulder height, and the panel hit the stone floor.

The sound of conservatory glass on stone was considerable.

The fragments distributed themselves across a radius of approximately eight feet — not dangerous in themselves, glass from a conservatory panel was thick enough that it did not shatter into fine splinters but broke into larger pieces, the kind that cut if you stepped on them or if they caught you at the wrong angle. Seraphine was not cut. She was standing very still with Cassian's arm in front of her and the sound of the impact still in her ears and the fine particle dust of old glass settling on the air around them.

From above, Rowan's voice: "Sera. Are you —"

"I'm fine," she said.

She said it to Rowan. But she was looking at Cassian.

He was still in the position he had arrived in — weight forward, arm extended, the specific posture of someone who had moved without consulting their judgment and whose body was now reporting back on what had happened. There was a rent in his left sleeve at the forearm where a fragment had caught it, and a cut across the back of his right hand, and the particular quality in his face of someone in the two seconds after acting without thinking, when the action has been completed but the mind has not yet caught up.

He looked at her. She looked at him.

Rowan was descending the iron ladder with controlled speed, and she could hear Isolde somewhere in the house corridor, responding to the sound of the impact, and these were both things that would require attention in a moment. But the moment itself — the two seconds before the moment became a set of things to manage — belonged to this: Cassian's face in the aftermath of an action that had not been calculated, and what it contained, and what it meant that she could read it.

"You're not," she said.

He looked down at his hand. The cut was approximately two inches, on the back of the hand between the first and second knuckles, bleeding with the mild steadiness of a superficial wound that was more annoying than dangerous. He looked at it with the expression of someone who had just remembered their body was a thing that could be affected by the world.

She was already reaching into her work jacket pocket. She always had cloth — clean cotton strips cut for botanical specimen handling, good absorbent material, sterile because the work required it. She took one out and went to him without asking and took his hand and folded the cloth across the cut and held it there.

His hand was very still in hers.

She worked with the focus she brought to anything requiring precision — the right pressure, the right fold, the ends tucked so it would hold without slipping. It was practical work. It was also the first time she had held his hand, and she was aware of this in the peripheral way she was aware of things she was managing carefully, things that were real and required attention but not right now.

Rowan reached the floor and came to them. He looked at the broken panel, at the failed bracket still hanging from the upper housing, at Cassian's bandaged hand, at Seraphine's expression, and he absorbed all of it with the practiced economy of a man who had learned when to speak and when to let silence do the work.

"The secondary bracket," he said to Cassian. "I flagged it in the assessment. I should have moved it to this week's work."

"You flagged it correctly," Cassian said. His voice was steady. He was looking at his bandaged hand, at Seraphine's hands still resting near it — she had finished the binding but not quite stepped back. "The schedule was the issue, not the assessment."

"I'll check the other secondary brackets today," Rowan said. "All of them."

"Yes," Cassian said. And then, to Seraphine, quietly: "Thank you."

For the bandage. She understood that was what he meant. But she heard it as something adjacent to the bandage, something that contained the bandage but was not only the bandage, and she nodded and stepped back with the composure of a person who was very practiced at composure and was currently finding it more work than usual.

The cleanup took the rest of the afternoon. Rowan inspected every secondary bracket in the conservatory, replaced two, reinforced three others. Seraphine swept and catalogued the glass fragments and assessed the root bed beneath the impact zone for secondary damage. Cassian managed Isolde's concerned questions and the household's response to the incident with the efficiency of someone who had been managing Luminara Hall's crises for long enough to have developed protocols.

In the evening, after dinner, Seraphine sat in her room with her work notes and noticed that her hands were not entirely steady. Not much. Just enough to be perceptible to her own observation, which was finely calibrated.

She put the notes down.

She looked at her hands — ordinary hands, soil-stained at the cuticles, with the calluses of the work she had been doing since she was old enough to do it. The hands that had bandaged a cut on the back of a man's hand that afternoon, in a conservatory, in the two seconds after something that had moved faster than thought.

She thought: *he went through the planting beds. He didn't go around.*

She thought: *that's how fast it was. That's how little he calculated.*

She thought about what it meant that someone had acted before thinking, toward her specifically, and she held that thought very carefully, the way you held things that were fragile not because they were weak but because they were the kind of thing that changed everything if you dropped them.

Then she picked up her notes and went back to work, because the work needed doing and because some things needed to be held for a while before they were examined.