The skin went quickly, vaporizing like paper, followed by the rest, the bones caving in on themselves to burst into puffing clouds of ash. It was over in a minute. When the last of the flames had died down, they shoveled the remains into the shallow pit Rey and Finn had dug, pushing a layer of earth on top.

They were tamping down the dirt when Caleb spoke. “I just want to say, I think he fought it. He could have killed me out there.”

Theo put his shovel aside. “Don’t take this the wrong way,” he said, “but what worries me is that he didn’t.”

In the days that followed, Peter thought about the events of that night, replaying them in his mind. Not only what had happened on the roof and Caleb’s strange story of the tower, but also his brother’s bitter tone when they’d spoken of the guns. Because Alicia was right; the guns meant something. His whole life Peter had thought of the world of the Time Before as something gone. It was as if a blade had fallen onto time itself, cleaving it into halves, that which came before and that which came after. Between these halves there was no bridge; the war had been lost, the Army was no more, the world beyond the Colony was an open grave of a history no one even remembered. Peter, in fact, had never given much thought to what his father had actually been looking for, out there in the dark. He supposed this was because it had seemed so obvious: people, other survivors. But holding one of his father’s rifles—and even now, lying in the barracks while his ankle mended and remembering the feel of it—he sensed something more, how the past and all its powers seemed to have flowed into him. So maybe that was what his father had been doing all along, on the Long Rides. He’d been trying to remember the world.