I was watching the fourth candidate bleed into a porcelain bowl when Caspar came to stand behind me, and I did not know what he was about to do.

I did not turn around.

The candidate in the chamber below was twenty-six. Her name was Nerys. Old stock. Her grandmother had been a midwife at our seventh-decade Gathering and had left alive and unremembering, which was the only kindness I still paid. Nerys had been in the chair now for eleven minutes. She was cutting her own palm in a single clean line. She did not rush. She did not flinch.

That was the first thing I measured.

The second thing I measured was the silence behind me. Caspar breathed once. He did not close the door. He always closed the door.

"She's steady," he said.

I said nothing.

"You've already chosen."

I let a beat pass. Through the glass, Nerys lifted her hand over the bowl. The blood came slowly. Four seconds before the first drop, which was longer than I had expected. I made a note.

"Not Nerys," I said.

"No."

He moved then. Not closer. Parallel. He stopped at the brass rail to my left, hands spread on the metal, not looking at me. The rail was cool. The observation lamp was at sixty percent warmth, as it had been every trial night for eleven years, and the light caught the silver at his temple. He had made that silver on purpose, in the fourth decade, and I had not asked him why. He had not offered.

Below us, Nerys pressed a cloth to her palm and waited to be dismissed. Saron would come for her in a minute. Saron was precise about these things.

"I won't be at the opening tomorrow," Caspar said.

I did not move.

I have watched a trial with Caspar at my left shoulder more nights than I have spent without him. Most of those he has not needed to speak. Of the ones where he has spoken, he has never spoken to tell me he would not be somewhere. That is not how we work. He tells me where to find him. He does not tell me where he will not be.

The tether stirred.

It was not a feeling. It was a pressure against the inside of a closed door. I had learned, over ninety decades, to recognize the shape of Caspar without content. Tonight the shape pressed against the wall and did not give me anything I recognized. Something had moved. He had moved, and I was finding out through the tether before I could find it out through him.

I kept my face still.

"I see," I said.

He looked at me then. His face was the same face it had been last night, and the night before, and in a room where we had both been mortal. The corner of his mouth was my earliest study. His eyes, blue-grey, closer to cloud than to water, were the second. That muscle moved before the rest of him knew anything had shifted.

They did not move.

That was the second lie, because if he had been telling the truth the corners would have tightened, not a tell, just the small relaxation of a man who has nothing to hide letting the hiding face go. His face was too still. He had prepared it.

"I have business," he said. "It won't take long."

"It never does."

Below us, Nerys stood. Saron opened the trial-chamber door. Nerys bowed to the observation glass, which she could not see through but knew existed, because old stock knew. She left. The porcelain bowl stayed on the table with four drops in it and a thin clean stain.

The chamber was empty.

I turned my face to the glass. Caspar turned his face to the glass. We both looked at the empty chamber as if watching it were something either of us could still do after what had been said.

"Who will you have me call in her place," he asked.

I kept my eyes on the bowl. "Livia."

He did not react. That was the third lie, because Livia had not been on the list I had shown him three days earlier. Livia was twenty-seven and new and unknown. Livia was not the kind of candidate we kept in the pipeline. He should have asked. He did not ask.

He already knew.

I let that settle inside me without letting it reach my face.

"Livia," he said, as if saying it for the first time.

"Yes."

"Tomorrow, then."

"Tomorrow."

He pushed off the rail with a slow hand. The motion was the same one he had used every night for ninety years and it was not the same one at all. He walked to the door. I listened to him not-quite-close it. He knew I knew. He was not pretending to hide it. He was pretending he had no reason to hide.

The door settled against the frame without latching.

I stayed at the rail.

The bowl was cooling. The lamp was at sixty. Through the ceiling I could hear, faintly, the building machinery. The old pipes. The electrical hum. A hundred years of sound I had organized into the word home.

I opened the ledger on the shelf to my right. I did not read it. I watched my hand rest on the page. My fingers were steady. I had trained them to be steady. They had been steady through every decade. Tonight they were steady and I could feel, underneath the steadiness, the first place in me that had started to shake.

I closed the book.

Below me, Saron returned to the chamber to clean the bowl. He moved with the careful, economical steps of a man who had carried water in a house where water was a ceremony. He took the bowl in both hands and did not spill.

I watched him.

My left hand had come up off the rail on its own and settled against the glass. I let it stay. I let the glass accept the shape of my palm.

"Caspar," I said aloud, into the empty room.

No one answered. The door was not-quite-closed. The tether pressed against a wall it had never pressed against before.

I lowered my hand.

Tomorrow was an opening. The opening was the start of our tenth decade. He would be there, because he had never not been, because the opening required both of us, because he could not be anywhere else.

He had just told me he would.

The bowl, below, went clean under Saron's cloth.

I took the ledger from its shelf and walked it to the study.

Let him come looking.