"I see," I said sadly.
"Now," said Henderson, "the conditions--the circumstances--of McCann's
death are somewhat suspicious. And so is the cash-return form itself."
"There's a chance it's a forgery?"
"One would think so," he said. "But our handwriting experts have worn
themselves out with that form, comparing it with every other single
scrap of McCann's writing they can find. And their conclusion is that
not only is it genuinely McCann's handwriting, but it is McCann's
handwriting at age fifty-six."
"So McCann must have written it," I said. "Under duress, do you think?"
"I have no idea," said Henderson complacently. "That's what you're
supposed to find out. Oh, there's just one more thing."