REMI'S POV The Edinburgh preliminary research note came on a Thursday morning in the second week of July. Isolde was eleven weeks. She had, in the past three weeks, developed opinions about the morning light — specifically its direction, which she tracked with the focused attention of someone developing a strong working theory about how illumination operated. She had also, in the past ten days, discovered that she could make sounds that were not the research cataloguing and not the specific request signal and not sleep, but something else. Something that was, I was almost certain, satisfaction. A small, rounded sound that arrived when something was working the way she'd expected. Dax had heard it the previous Thursday and gone very still. "That's new," he said. "Three days," I said.

