“I’ll be fine,” he told Amy, who was, after everything that had happened, the same. Her scalded skin had peeled away, exposing, beneath it, a new layer, white as moonlit milk. “Just a few days off my feet and I’ll be right as rain.”

He took to his cot under the eaves in the room next to Amy’s. He felt the days passing around him, through him. He was dying, he knew. The fast-dividing cells of his body—the lining of his throat and stomach, his hair, the gums that held his teeth—were being killed off first, because wasn’t that what radiation did? And now it had found the core of him, reaching into him like a great, lethal hand, black and bird-boned. He felt himself dissolving, like a pill in water, the process irrevocable. He should have tried to get them off the mountain, but that moment was long passed. At the periphery of his consciousness, he was aware of Amy’s presence, her movements in the room, her watchful, too-wise eyes upon him. She held cups of water to his broken lips; he did his best to drink, wanting the moisture but wanting, even more, to please her, to offer some assurance that he would become well. But nothing would stay down.

“I’m all right,” she told him, again and again, though perhaps he was dreaming this. Her voice was quiet, close to his ear. She stroked his forehead with a cloth. He felt her soft breath on his face in the darkened room. “I’m all right.”

She was a child. What would become of her, after he was gone? This girl who barely slept or ate, whose body knew nothing of illness or pain?

No, she wouldn’t die. That was the worst of it, the terrible thing they’d done. Time parted around her, like waves around a pier. It moved past her while Amy stayed the same. And all the days of Noah were nine hundred and fifty years. However they had done it, Amy would not, could not die.

I’m sorry, he thought. I did my best and it wasn’t enough. I was too afraid from the start. If there was a plan, I couldn’t see it. Amy, Eva, Lila, Lacey. I was just a man. I’m sorry, I’m sorry, I’m sorry, I’m sorry.