Which? Could they decide the point? With some additional data, they could. Their linked minds went en rapport with Worsel, with Nadreck, with Kinnison, and with the principal statistician at Prime Base.

In addition to Nadreck's locus, they determined two more—one of all inimical manifestations, the other of those which Nadreck had not used in his computations. Their final exhaustive analysis showed that there were at least two, and very probably only two, prime intelligences directing those Boskonian activities. They made no attempt to identify either of them. They communicated to Nadreck their results and their conclusions.

"I am working on Kandron," the Palainian replied, flatly. "I made no assumptions as to whether or not there were other prime movers at work, since the point has no bearing. Your information is very interesting, and may perhaps prove valuable, and I thank you for it—but my present assignment is to find and to kill Kandron of Onlo."


Tregonsee and Camilla, then, set out to find "X"; not any definite actual or deduced entity, but the perpetrator of certain closely related and highly characteristic phenomena, viz., mass psychoses and mass hysterias. Nor did they extrapolate. They visited the last few planets which had been affected, in the order in which the attacks had occurred. They studied every phase of every situation. They worked slowly, but—they hoped and they believed—surely. Neither of them had any idea then that behind "X" lay Ploor, and beyond Ploor, Eddore.

Having examined the planet latest to be stricken, they made no effort to pick out definitely the one next to be attacked. It might be any one of ten worlds, or possibly even twelve. Hence, neglecting entirely the mathematical and logical probabilities involved, they watched them all, each taking six. Each flitted from world to world, with senses alert to perceive the first sign of subversive activity. Tregonsee was a retired magnate, spending his declining years in seeing the galaxy; Camilla was a Tellurian business girl on vacation.



Young, beautiful, innocent-looking girls who traveled alone were, then as ever, regarded as fair game by the Don Juan of any given human world. Scarcely had Camilla registered at the Hotel Grande when a well-groomed, self-satisfied man-about-town made an approach.