away, of course, but without a shred of evidence I can't act, even if they are as big a zwilnik outfit as Wembleson's was, on Bronseca...." "I know. I'm not accusing them. It may be anything from Vandemar to Andromeda. All firms—all individuals, for that matter—have spy-ray blocks. Call me, will you, when you get that report?" The call came eventually and the Patrolman was round-eyed as he imparted the information that, as far as anyone could discover, there had been no Lonabarian gems and the rescuing cruiser had not been a Patrol vessel at all. Cloud was not surprised. "I thought so," he said, flatly. "This is a hell of a thing to say, but it now becomes a virtual certainty—mathematically, the probability approaches absolute certainty as a limit—that this whole fantastic procedure was designed solely to keep me from analyzing and blowing out that vortex. Here's what I'm going to do." Bending over the desk, even in that ultra-shielded office, he whispered busily for minutes. "But listen, Doctor!" the Patrolman protested. "Wait—let a Lensman do it. Do you realize that if they're clean and if they catch you at it, nothing in the universe can keep you from doing at least ninety days in the clink?" "Yes. But if we wait, the chances are that it'll be too late. They will have had time to cover up whatever they're doing. What I am asking you is—will you back my play if I catch them with the goods?" "Yes. We'll be here, armored and ready. But I still think you're completely nuts." "Maybe so, but if my mathematics is wrong, it is still a fact that my arm will grow back on just as fast in clink as anywhere else. Clear ether, Lieutenant—until tonight." Cloud made an engagement for luncheon with Graves. Arriving a few minutes early, he was of course shown into the private office. Seeing that the manager was busily signing papers, he strolled aimlessly to the side window and seemed to gaze appreciatively at the masses of gorgeously-blooming flowers just outside. What he really saw, however, was his detector. Since he was wearing it openly upon his wrist, he knew that he was not under observation. Nobody knew that he had in his sleeve a couple of small but highly efficient implements. Nobody knew that he was left-handed. Nobody knew that he had surveyed, inch by inch, the burglar-alarm wiring of this particular window, nor that he was an expert in such matters. Therefore no one saw what he did, nor was any signal given that he did anything