"No. If I wanted to burn it down, I would have lighted a fire at the mill, not in the woods. If I wanted to burn it down, I would burn it down." Mark stood before Barry's desk, not defiant, not frightened. He waited.

"Where were you all night?"

"In the old house. I was reading about Norfolk, studying maps…"

"Never mind about that." Barry drummed his fingers on his desk, pushed back the charts he had been studying, and stood up. "Listen to me, Mark. Some of them think you're responsible for the fire, the dam, everything. I made the point you just made: if you had tried to burn down the mill, you could have done it easily enough without going through all that. The question is still open. The mill is off limits to you. So is the laboratory, and the boat works. Do you understand?"

Mark nodded. Explosives for river clearing were kept in the boat-works building.

"I was at the old house when the fire started," Barry said suddenly, and his voice was very cold and hard. "I saw a curious thing. It looked like an eruption of some sort. I've thought a lot about it. It could have been an explosion, enough to start the landslide. Of course, no one could have seen it from the valley, and whatever noise it made would have been masked if it were underground even a little bit, and by the noise everyone was making fighting the fire."

"Barry," Mark said, interrupting him. "A few years ago you said something to me that was very important, and I believed you then and still believe you. You said you wouldn't hurt me. Do you remember?" Barry nodded, still cold and watchful. "I say that to you now, Barry. These people are my people too, you know. I promise you I won't ever try to hurt them. I have never done anything purposely to harm any of them, and I never will. I promise that."

Barry watched him distrustfully, and Mark smiled softly. "I've never lied to you, you know. No matter what I had done, I admitted it if you asked. I'm not lying now."

Abruptly Barry sat down again. "Why were you looking up Norfolk? What is Norfolk?"

"There was a naval base there, one of the biggest on the East Coast. When the end was coming, they must have put hundreds of ships into dry dock. The ocean levels have been dropping. Chesapeake Bay, Delaware Bay, it will be low there too, and those ships are high and dry—they called it mothballing them. I began to think of the metal in the ships. Stainless steel, copper, brass… Some of those ships held crews of a thousand men, with supplies for that many, medicines, test tubes, everything."