Fen was already at the terminal when I came through the door.
She hadn't needed Ada to guide her. Ada was two steps behind, not beside, and that gap told me everything about how the fourteen months had reorganised what they were to each other. Fen had her hands on the keyboard and the focus of someone working a problem they'd been sitting on long enough that the sitting had become its own kind of discipline.
She looked up when I entered. Didn't perform surprise. Didn't perform anything.
"I wondered when you'd come down here," she said.
"How long have you known about the room?"
"Since he built it." She turned back to the screen. "He brought me down here himself. Walked me through the terminal, the archive structure, the authentication protocol. Then he told me to forget I'd seen it until someone came and asked me the right question."
"What was the right question?"
She paused on the keyboard. "You already asked it. When you looked at the photograph in Ada's room." She pulled up a secondary window without looking at me. "That was what he said. He said you'd look at the photograph and you'd understand what you were looking at and you wouldn't say anything. He said that was how he'd know he'd read you correctly."
The room was eight steps below the maintenance corridor behind the eastern relay station. A junction box panel that was not a junction box panel. Old concrete, recycled air, the particular underground quiet that absorbs sound without returning it. My father had routed the room through the compound's original infrastructure — not added to it, built into it — eight years ago, before any of this, when he was already thinking fourteen moves ahead of a problem he hadn't yet named.
I came around to look at the screen. Fen moved half a step to make room without being asked.
"Cord's full transmission history," she said. "Seven months. Forty-one transmissions to Croft's logistics coordinator. The first eighteen are noise — shift rotations, supply inventories, standard operational data that would mean nothing to anyone who didn't know what to look for." She scrolled. Stopped. "Transmission nineteen is where it changes."
I looked at the timestamp. Eleven months ago.
Three lines of compressed text.
I read them and the room went quiet inside me in a way that had nothing to do with the concrete walls.
Cord had reported my father's first symptom to Croft's network three days before anyone in this compound knew there was anything wrong.
"He didn't cause it," Fen said. She read my face the way someone reads a face they've been watching for a long time from a position they were never supposed to occupy. "I've been through the medical timeline more than once. He observed and reported. The causation runs the other way."
"But he understood what it meant."
"Within the first week. Yes."
"And kept the channel open for seven more months."
She didn't answer. The answer was the number she'd already given me.
I stood with it. Not grief. Something more specific than grief — the particular quality of anger that arrives fully formed and has nowhere useful to go because the thing it wants to correct is already finished. My father had known someone inside his walls was feeding Croft his own deterioration in real time. He'd built the trap around that knowledge. Not through it, not over it. Around it. Because closing the channel meant Croft lost a window and a lost window made him cautious and a cautious Croft stopped moving and a Croft who stopped moving couldn't be caught mid-step.
He had watched Cord report him dying for fourteen months and said nothing and kept building.
I understood it completely. That was the part I hadn't expected. Three years ago I would have called it cold. Standing here now I recognised it as the most precise form of love for something I'd ever seen — a man who cared more about what he was leaving behind than about the cost of leaving it.
"Fen." I kept my voice even. "I need the full archive authenticated and formatted for network presentation. Timestamped. Unedited. Something Silas can put in front of seven nodes and have it hold."
"Forty-three hours is enough."
"Good."
Ada had stayed near the door. She'd said almost nothing since we came down. She had the quality now of someone present not for operational reasons but because she needed to watch this particular thing happen and had earned the right to watch it. I glanced at her. She didn't look back. She was watching Fen.
"She's known about Marcus since she flagged him," Ada said. Quietly. Not quite to me.
Fourteen months. Fen had found the thread on Marcus, run his background against compound records, identified the connection to Croft's network, and then been told by my father to put it down and leave it alone. She had left it alone. She had sat with what she knew for fourteen months inside a compound where the man she'd identified was engaged to the man's daughter.
I thought about what that actually required. Not just the discipline of it. The specific loneliness of it. Knowing something with full clarity and having no one to tell and no permission to use it and no resolution on the horizon except the one you'd been told to trust was coming.
"When this is done," I said, loud enough to carry, "I'll tell you everything. What he told me, what I've read, what I understand now that I didn't when I left this place." A pause. "He didn't keep you outside the picture. He kept you inside the piece of it he trusted most."
Fen's hands went still on the keyboard.
Two seconds. Maybe three.
Then she went back to work.
I didn't wait for Ada to say anything. I turned and went back up through the maintenance corridor, through the panel door, out into the compound.
The cold hit immediately.
I stood in it for a moment. Overhead the sky had gone the particular deep dark of very late evening, no cloud, the kind of night that feels like it's been waiting for something to happen in it.
I took out my phone.
Ready when you are.
Raze's reply came inside twenty seconds.
Already here.