sky-screen flamed crimson. The cruiser was within Pluto’s atmosphere blanket.

Duncan gasped for breath. He was scarcely conscious of manipulating the cruiser, leveling off into a long, swooping glide. Death had touched him very nearly—and had been avoided miraculously by a fantastically small margin. The implications of what had happened turned Duncan white with incredulous shock.

For the thing that had been en rapport with his mind had tried to kill him. And that thing had been not a Plutonian, but a Varra! Duncan was certain of that. In his space-piloting days he had been in close touch with the Varra, and had learned the distinctive feel of the creatures—there was no other word—within his mind.

But the Varra were friendly to Earthmen!

The rough terrain of Pluto lay below. A cold, bluish radiance, almost invisible, seemed to flicker here and there. Duncan set the ship down with trained skill, landing on a broad plateau at the base of a high range of alps.

He was on Pluto, shunned and feared by Earthmen for a hundred and fifty years. He was in the very lair of the mind-vampires.

And nothing happened.

Slowly Duncan rose and turned the valves on the oxygen tanks. He divested himself of his spacesuit and made a careful examination of the two bodies. Both Olcott and Hartman had been killed, apparently, by the Plutonians. They had the stigmata.

But Duncan was thinking a rather impossible thought—that there were no Plutonians.

With half of his mind he made tests. There was atmosphere, almost pure chlorine. Nor was it unduly cold. An electroscope gave him the answer. Pluto was a radioactive planet, warmed from within by the powerful radiations of the ore.

Duncan took the dead Olcott’s helmet and adjusted it upon himself. Turning on the power made the intertron knob glow, but there was no other result. The Varra, of course, could not safely venture within the Heaviside Layer of any planet, and Pluto had a Layer, since it had an atmosphere. Chlorine—radium—Duncan shook his head, trying to fit the puzzle together.

There were no Plutonians. Why, then, had the Varra fostered the legend of the mind-vampires? Creatures composed of pure energy could not exist on a radioactive planet; the radiations would be fatal to their complicated electronic 

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