Caleb shook his head. “The jenny. I’m not kidding, that was exactly what it sounded like. I’d never heard anything like it. When I looked down she’s just keeling over, going down like a bag of rocks. It takes me a second to figure what I’m seeing. It’s blood. A lot of it.” He wiped his greasy mouth with the back of his hand and pushed the empty dish of paste aside. “Zander always said this stuff tasted like balls. I was like, When did you eat balls, Zander, like I really want to know? But after three days, it’s really not half bad.”

Theo sighed impatiently. “Caleb, please. The blood—”

He took a long swig of water. “Right, okay, so. The blood. Zander’s kneeling by her and I yell, Zander, what the hell happened? When he gets up I see he’s stripped to the waist, he’s got a blade in his hand, and there’s blood all over him. Somehow I missed the signs. I’ve got about five seconds before he comes up the ladder for me, too. But he doesn’t. He just sits down at the base of the tower, in the shade of one of the struts, where I can’t see him. Zander, I yell down, listen to me. You got to fight this thing. I’m all alone up here. I’m thinking that maybe if I can get him to snap out of it long enough, I can make a run for it.”

“I don’t get it,” Alicia said. “When would he have gotten infected?”

“That’s the thing,” Caleb went on. “I couldn’t figure that either. I’d been with him just about every minute of the day.”

“What about at night?” Theo offered. “You said he didn’t sleep. Maybe he went outside.”

“I suppose that’s possible, but why would he? And plus, he didn’t really look any different, apart from the blood.”

“What about his eyes?”