Figures revolved in Black's mind. If Lawrence—or if he—could corner six percent of the stock.... Could some of the independents be persuaded to sell, psionically persuaded? Or one of the other major stockholders? No, that would be unethical and the strongest part of a psi's training was a fine code of ethics.

Black began to doze—and felt something ever so softly probing at his mind. A probe! Probably a service psi checking on him. Why? Just the usual check? No, it wasn't due.

He knew what to do. He had been probed before. Probing was part of the training at psi school but he had never revealed—and his tutors had never guessed—that he could create a block that could not be sensed by the prober. A block which could close off whatever thoughts he wished to conceal.

He blocked his thoughts of Lawrence and the deal now, and opened freely that part of his mind which held the routine thoughts of the law offices. He felt that feather of thought brushing lightly through his brain, then it was gone as quickly as it had come.

There was a cold sweat over him but he knew that he had passed the test. Why the probe? Perhaps a BEB psi had wind of Lawrence's deal and by probing Lawrence's mind—or the mind of someone in the West Coast realty outfit—had somehow learned of Black's association with the industrialist. If that were the case there would be more probes. One time or another a probe might come at a moment of nervous tension or stress and the information would be gleaned from his mind before he could block!

He must work fast.

He arose and went to the visiphone, placed a person-to-person call to Los Angeles.

"Dick Joyce?" he asked before the visual contact was complete, and only his voice went out.

The face that came in sync on the screen was round, jovial. "Well, hello, Marty!"

Lawrence must have called him, or else he plucked the name from my mind. But he didn't probe—or did he?