We weren’t alone. Under a wall decorated with a chrome representation of the Order’s kissing-fish symbol, a salesgirl was talking an elderly couple through a brochure on the Order’s genealogy services. The old folk turned and stared at us, dismayed and perhaps a little frightened. But the assistant was of the Order. She looked at me with blank smoke-gray eyes, slowly hardening to anger. I was sure she didn’t know why she felt that way. I quailed nevertheless.

Rosa glanced at the customers. She said, “Come through.”

I followed her to the elevator at the back, which took us down to the big modern anteroom, where cameras peered at me, insectile. The receptionist-guard behind her broad marble desk stared at me with undisguised hostility.

I asked, “If Peter’s here, who let him in?”

“Nobody. He found a way down one of the old ventilation shafts.”

I remembered the ancient, disused chimney; yes, I realized, if you knew what you were doing, it wouldn’t be so hard to work your way in. I laughed. “Peter’s a bit tubby for a potholer.”

She stood close to me. I smelled something of the animal stink of the Crypt about her. Her fists were clenched, her body rigid, every muscle suffused with anger. “You think this is funny? Do you? Funny? He isn’t one of us. He has nothing to do with the Order. And he’s here because of you.”

“I didn’t tell him where the shaft outlets were. I don’t even know myself.”

“Evidently you told him enough for him to work it out. You betrayed our trust, George. You betrayed my trust. I took you into my home. I showed you its treasures. And you told an outsider. Perhaps you aren’t fit to join us after all.”

Her cold, angry rejection was powerful. It hurt badly to feel such exclusion, despite my ambiguous feelings about the whole setup.

“Rosa, I know Peter. Outsider or not he’s an old friend who was good to Dad in his final years. He is—odd. Obsessive, eccentric. He has big ideas. But even if it’s true he’s broken in here he’s harmless.”

“Harmless. Really.” Rosa walked behind the marble desk to the guard’s PC. It took her a couple of minutes to find what she wanted. She swiveled the screen on its mount to show me. “This is an Interpol report. Posted by the FBI.” Illustrated by small, grainy photographs, it was a report of an explosion at a university science lab in San Jose, California. The lab had been devoted to something called “geometric optics.” The blast had destroyed the building and killed three people, including a cleaner and the head of the facility. The FBI appeared convinced it was some kind of sabotage. In the corner of the image the FBI had posted two photographs, of suspects they associated with the incident.