“Shut up about Leibniz for a moment, Rudy, because look here: You—Rudy—and I are on a train, as it were, sitting in the dining car, having a nice conversation, and that train is being pulled along at a terrific clip by certain locomotives named The Bertrand Russell and Riemann and Euler and others. And our friend Lawrence is running alongside the train, trying to keep up with us—it’s not that we’re smarter than he is, necessarily, but that he’s a farmer who didn’t get a ticket. And I, Rudy, am simply reaching out through the open window here, trying to pull him onto the fucking train with us so that the three of us can have a nice little chat about mathematics without having to listen to him panting and gasping for breath the whole way.”

“It was just regular growing up, of course, the kind everyone does - but it still hurt him, I know, like the memory I have of the time he dropped me off at the train station when I was going back to Chicago. I could see him through the window of the train, but he couldn't see me through the tinted glass. I waved, trying to get his attention as he walked up and down the platform trying to figure out where I was sitting. From up in the train, he looked so small. If he'd seen me, he would have smiled and waved, but he didn't know I could see him, and the sadness on his face was exposed to me then. He looked lost. He stood there on the platform a long time, even after my train started pulling away, still trying to catch a glimpse of me waving back.”

“And Türing answered another,” Rudy said. “Who’s that?” “It’s me,” Alan said. “But Rudy’s joking. ‘Turing’ doesn’t really have an umlaut in it.” “He’s going to have an umlaut in him later tonight,” Rudy said, looking at Alan in a way that, in retrospect, years later, Lawrence would understand to have been smoldering.”

“My father told his acquaintances about that for years, even though both Hannah and I had given up on wormholes and the Child Genius series very soon afterward. That must have made my father sad, as it had made him sad when we stopped being excited about family vacations, when we stopped being open about our interests, and left home and pursued lives of our own. It was just regular growing up, of course, the kind everyone does, but it still made him sad, I know, like the memory I have of the time he dropped me off at the train station when I was going back to Chicago. I could see him through the window of the train, but he couldn't see me through the tinted glass. From up in the train, he looked so small. If he'd seen me, he would have smiled and waved, but he didn't know I could see him, and the sadness on his face was exposed to me then. He looked lost. He stood there on the platform a long time, even after my train started pulling away, still trying to catch a glimpse of me waving back.”

“He took a deep breath. “We came here to train, and we should train. If we just spend all the time we’re supposed to be training making out instead, they’ll quit letting me help train you at all.”“Aren’t they supposed to be hiring someone else to train me full-time anyway?”“Yes,” he said, getting up and pulling her to her feet along with him, “and I’m worried that if you get into the habit of making out with your instructors, you’ll wind up making out with him, too.”“Don’t be sexist. They could find me a female instructor.”“In that case you have my permission to make out with her, as long as I can watch.”“Nice.” Clary grinned, bending down to fold up the blanket they’d brought to sit on. “You’re just worried they’ll hire a male instructor and he’ll be hotter than you.”Jace’s eyebrows went up. “Hotter than me?”“It could happen,” Clary said. “You know, theoretically.”“Theoretically the planet could suddenly crack in half, leaving me on one side and you on the other side, forever and tragically parted, but I’m not worried about that, either. Some things,” Jace said, with his customary crooked smile, “are just too unlikely to dwell upon.”

“Dresden’s not gone,” I said. I touched a hand lightly to my brow. “He’s here.” I touched Will’s bare chest, on the left side. “Here. Without him, without what he’s done over the years, you and I would never have been able to pull this off.”“No,” he agreed. “Probably not. Definitely not.”“There are a lot of people he’s taught. Trained. Defended. And he’s been an example. No single one of us can ever be what he was. But together, maybe we can.”