in each of the disasters. All had been sent by the same man; all had been typed on the same machine; all had been mailed in New York.

When the sixth warning had come to the offices of Caribbean Trans-Air, the S.M.M.R., working through the FBI, had persuaded the company's officials to take the regularly scheduled aircraft off the run and substitute another while the regular ship was carefully inspected. But it was the replacement ship that came to pieces in midair.

The anonymous predictor, whoever he was, was a man of no mean ability.

Then letter number seven had been received by the United States Department of Space. It predicted that a meteor would smash into America's Moonbase One, completely destroying it.

Finally, a non-anonymous letter had come to the S.M.M.R. requesting admission to the society, enclosing the proper fee. The letter also said that the writer was interested in literature on the subjects of prescience, precognition, and/or prophecy, and would be interested in contacting anyone who had had experience with such phenomena.

Putting two and two together only yields four, no matter how often it's done, but two to the eighth power gives a nice, round two hundred fifty-six, which is something one can sink one's teeth into.

Brian Taggert cut off the phone connection. "That's it, Mike," he said to the senator. "We've got him."

Two of the Society's agents, both top-flight telepaths, had gone out to "Dr. Joachim's" place on Coney Island's Boardwalk, posing as customers—"clients" was the word Dr. Joachim preferred—and had done a thorough probing job.

"He's what might be called a perfectly sincere fraud," Taggert continued. "You know the type I'm sure."

The senator nodded silently. The woods were full of that kind of thing. Complete, reliable control of any kind of psionic power requires understanding and sanity, but the ability lies dormant in many minds that cannot control it, and it can and does burst forth erratically at times. Finding a physical analogy for the phenomenon is difficult, since mental activities are, of necessity, of a higher order than physical activities.

Some of the operations of tensor calculus have analogs in algebra; many do not.

Taggert gestured with one hand. "He's been in business there for years. Evidently, he's been able to make a few accurate predictions now and then—enough to keep his reputation going. He's tried to increase the frequency, accuracy, and detail of his 'flashes' by studying up on the techniques used by other seers, and, as a result, he's managed to soak up enough mystic balderdash to fill a library.

"He embellishes every one of his predictions to his 'clients' with all kinds of hokum, and he's been doing it so long that he really isn't sure how much of any prediction is truth and how much is embroidery work.

"The boys are trying to get more information on him now, and they're going to do a little deep probing, if they can get him set up right; maybe they'll be able to trigger off another flash on that moon-hit—but I doubt it."

Senator Kerotski thumbed his chin morosely. "You're probably right. Apparently, once those hunches come to a precog, they get everything in a flash and then they can't get another thing—ever. I wish we could get our hands on one who was halfway along toward the point. We've got experts on psychokinetics, levitation, telepathy, clairvoyance, and what-have-you. But precognition we don't seem to be able to find."

"We've got one now," Brian Taggert reminded him.

The senator snorted. "Even assuming that we had any theory on precognition completely symbolized, and assuming that this Forsythe has the kind of mind that can be taught, do you think we could get it done in a month? Because that's all the time we have."

"He's our first case," Taggert admitted. "We'll have to probe everything out of him and construct symbol-theory around what we get. I'll be surprised if we get anywhere at all in the first six months."

Senator Kerotski put his hand over his eyes. "I give up. First the Chinese Soviet kidnaps Dr. Ch'ien and we have to scramble like maniacs to get him back before they find out that he's building a space drive that will make the rocket industry obsolete. Then we have to find out what's causing the rash of accidents that is holding up Dr. Theodore Nordred's antigravity project. And now, just as everything is coming to a head in both departments, we find that a meteor is going to hit Moonbase One sometime between thirty and sixty days from now." He spread apart the middle and ring fingers of the hand that covered his eyes and looked at Taggert through one eye. "And now you tell me that the only man who can pinpoint that time more exactly for us is of no use whatever to us. If we knew when that meteor was due to arrive, we would be able to spot and deflect it in time. It must be of pretty good size if it's going to demolish the whole base."

"How do you know it's going to be a meteor?"

"You think the Soviets would try to bomb it? Don't be silly, Taggert," Kerotski said, grinning.

Taggert grinned back. "I'm not thinking they'd bomb us; but I'm trying to look at all the angles."

The worried look came back to the senator's pandalike face. "We have to do something. If only we knew that Forsythe's prediction will really come off. Or, if it will, then exactly when? And is there anything we can do about it, or will it be like the airline incident. If we hadn't made them switch planes, nothing would have happened. What if, no matter what we do, Moonbase One goes anyway?

"Remember, we haven't yet built Moonbase Two. If our only base on the moon is destroyed, the Soviets will have the whole moon to themselves. Have you any suggestions?"

"Sure," said Taggert. "Ask yourself one question: What is the purpose of Moonbase One?"

Slowly, a beatific smile spread itself over the senator's face.

The whole discussion had taken exactly ninety seconds.

"Mrs. Jesser," said Brian Taggert to the well-rounded, fortyish woman behind the reception desk at S.M.M.R. headquarters, "this is Dr. Forsythe. He has established a reputation as one of the finest seers living today."

Mrs. Jesser looked at the distinguished, white-bearded gentleman with an expression that was almost identical with the one her grandmother had worn when she met Rudolph Valentino, nearly sixty years before, and the one her mother had worn when she saw Frank Sinatra a generation later. It was not an uncommon expression for Mrs. Jesser's face to wear: it appeared every time she was introduced to anyone who looked impressive and was touted as a great mystic of one kind or another.

"I'm so glad to meet you, Dr. Forsythe!" she burbled eagerly.

"Dr. Forsythe will be working for us for the next few months—his office will be Room B on the fourth floor," Taggert finished. He was genuinely fond of the woman, in spite of her mental dithers and schoolgirl mannerisms. Mysticism fascinated her, and she was firmly convinced that she had "just a weenie bit" of psychic power herself, although its exact nature seemed to change from time to time. But she did both her jobs well, although she was not aware of her double function. She thought she was being paid as a receptionist and phone operator, and she was quick and efficient about her work. She was also the perfect screen for the Society's real work, for if anyone ever suspected that the S.M.M.R. was not the group of crackpots that it appeared to be, five minutes talking with Mrs. Jesser would convince them otherwise.

"Oh, you're staying with us, Dr. Forsythe? How wonderful! We simply must have a talk sometime!"

"Indeed we must, dear lady," said Forsythe. His voice and manner had just the right amount