Pif sighed. She wasn’t convinced. “Is there no one who’ll miss you? You said you had a sister, a mother.”

“Not contacting them ever again was the price I had to pay for Boris leaving them alone. I never told them what I was doing, and they never asked. I disappeared. They thought I was dead, and I’ve given them no reason to suppose otherwise. Apart from that, no. I’ve made no friends, had no girlfriends, I’ve maybe a handful of acquaintances. No one’s going to miss me.” He took a mouthful of coffee, almost too hot to drink, and thought of his last sight of Sister Madeleine. “No one.”

“Then how are you different from Inspector Chain?” Pif balanced her mug on a rough pile of his lab notes and knelt down in front of the desk. She rested her elbows on the edge and cradled her face in her hands.

“He was given the responsibility and powers of a policeman. What’s he done with them? I got given the single opportunity to save Dalton, and what did I do? That he’s walking around, living and breathing, spawning little Reconstructionists, is down to me. No one else. So yeah. I’m different from that lazy sooksin.”

“Is this what it’s like, then?” she said, eyes closed, dreaming. “People like us, we think differently, don’t we? We are different. We do all the things that others do. We go out to parties and concerts, we go to conferences and drink and talk, we play music and games and we laugh and cry. But when it comes down to it, we don’t actually need anyone else. We’re happy doing what we do and having obligations interferes with that. Does that make us selfish, or something else?”

“I don’t know. To them, I guess it is selfish. Me? I just have such a monstrous sense of self, I don’t need to feel love. I don’t even feel lonely.” He watched Pif’s hair beads swinging slightly in time with her breathing. “Sometimes I wonder what it might be like. To be with someone, well, who isn’t me. And sometimes I think we don’t even need ourselves. What’s most important is to find out whether we’re right or not.”

“So what are you going to do?”

“I’ve run out of places to go. I can’t go home. I can’t travel on the tube with the guns. I don’t think I can walk to Regent’s Park: it’s madness on the streets today. And I still don’t think any of that was my fault.” Petrovitch swilled his coffee around inside his mug and watched the play of light against the black surface. “It’s against the rules, but I’ll camp down here tonight and meet Marchenkho in the morning.”