"You find my appearance strangely youthful. What would be your reaction if I told you that I've aged greatly in the past few months? That a year ago I could have passed as no older than thirty without the slightest difficulty——"

"I don't think I'd believe you," I said. "And I'm sorry, Mr. Foster; but I don't believe the bit about the 1918 hospital either. How can I? It's——"

"I know. Fantastic. But let's go back a moment to the book itself. Look closely at the paper; it's been examined by experts. They're baffled by it. Attempts to analyze it chemically failed—they were unable to take a sample. It's impervious to solvents——"

"They couldn't get a sample?" I said. "Why not just tear off the corner of one of the sheets?"

"Try it," Foster said.

I picked up the book and plucked at the edge of one of the blank sheets, then pinched harder and pulled. The paper held. I got a better grip and pulled again. It was like fine, tough leather, except that it didn't even stretch.

"It's tough, all right," I said. I took out my pocket knife and opened it and worked on the edge of the paper. Nothing. I went over to the bureau and put the paper flat against the top and sawed at it, putting my weight on the knife. I raised the knife and brought it down hard. I didn't so much as mark the sheet. I put the knife away.

"That's some paper, Mr. Foster," I said.

"Try to tear the binding," Foster said. "Put a match to it. Shoot at it if you like. Nothing will make an impression on that material. Now, you're a logical man, Legion. Is there something here outside ordinary experience or is there not?"

I sat down, feeling for a cigarette. I still didn't have.

"What does it prove?" I said.

"Only that the book is not a simple fraud. You're facing something which can't be dismissed as fancy. The book exists. That is our basic point of departure."

"Where do we go from there?"

"There is a second factor to be considered," Foster went on. "At some time in the past I seem to have made an enemy. Someone, or something, is systematically hunting me."

I tried a laugh, but it felt out of place. "Why not sit still and let it catch up with you? Maybe it could tell you what 

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