He shook his head in the same way that a man shakes it when he is trying to explain why two plus two are four and not maybe five or three and a half. "Steve," he said, "You haven't got Mekstroms' Disease."

"How do I get it?" I demanded hotly.

"Nobody knows," he said unhappily. "If we did, we'd be providing the rest of the human race with indestructible bodies as fast as we could spread it and take care of them."

"But couldn't I have been told something?" I pleaded. I must have sounded like a hurt kitten.

Marian put her hand on my arm. "Steve," she said, "You'd have been smoothed over, maybe brought in to work for us in some dead area. But then you turned up acting dangerously for all of us."

"Who—me?"

"By the time you came out for your visit, you were dangerous to us."

"What do you mean?"

"Let me find out. Relax, will you Steve? I'd like to read you deep. Catherine, you come in with me."

"What are we looking for?"