The President leaned back in his chair. "I really can't quite understand it. Extra-sensory perception--why should it drive men insane? Wendell's papers don't say enough. He claims it can be mathematically worked out--that he _did_ work it out--but we don't have any proof of that." The man named Frank scowled. "Wasn't that demonstration of his proof enough?" A small, graying, intelligent-faced man who had been sitting silently, listening to the conversation, spoke at last. "Mr. President, I'm afraid I still don't completely understand the problem. If we could go over it, and get it straightened out--" He left the sentence hanging expectantly. "Certainly. This Paul Wendell is a--well, he called himself a psionic mathematician. Actually, he had quite a respectable reputation in the mathematical field. He did very important work in cybernetic theory, but he dropped it several years ago--said that the human mind couldn't be worked at from a mechanistic angle. He studied various branches of psychology, and eventually dropped them all. He built several of those queer psionic machines--gold detectors, and something he called a hexer. He's done a lot of different things, evidently." "Sounds like he was unable to make up his mind," said the small man. * * * * * The President shook his head firmly. "Not at all. He did new, creative work in every one of the fields he touched. He was considered something of a mystic, but not a crackpot, or a screwball. "But, anyhow, the point is that he evidently found what he'd been looking for for years. He asked for an appointment with me; I okayed the request because of his reputation. He would only tell me that he'd stumbled across something that was vital to national defense and the future of mankind; but I felt that, in view of the work he had done, he was entitled to a hearing." "And he proved to you, beyond any doubt, that he had this power?" the small man asked. Frank shifted his big body uneasily in his chair. "He certainly did, Mr. Secretary." The President nodded. "I know it might not sound too impressive when heard second-hand, but Paul Wendell could tell me more of what was going on in the world than our Central Intelligence agents have been able to dig up in twenty years. And he claimed he could teach the trick to anyone. "I told him I'd think it over. Naturally, my first step was to make sure that he was followed twenty-four hours a day. A man with information like that simply could not be allowed to fall into enemy hands." The President scowled, as though angry with himself. "I'm sorry to say that I didn't realize the full potentialities of what he had said for several days--not until I got Frank's first report." * * * * * "You could hardly be expected to, Mr. President," Frank said. "After all, something like that is pretty heady stuff."