"I hated to do that," Conley sighed, "'cause I kind of like those creatures. They have intelligence of a sort. They're harmless enough ordinarily, except for their voracious appetites for metal!"

"The damn things sometimes visit our mines to the south," Wessel said, "but I'm kind of surprised to find 'em away up here. That can only mean one thing, though. We're on the right track! The radite must stem from one huge central deposit somewhere up here!" His eyes gleamed at the thought.

To Jim it meant even more. The converging radite veins, Kaarji's story of the perpetual lure that tormented him, and most of all that mysterious bit of strange metal—all this pointed to one thing, a secret somewhere to the north. And that secret was M'Tonak. Jim was sure of it now. He was sure they would reach it, that they were meant to reach it.

The thought surged within him, made him restless and foreboding. So that when, late that day, the car came—the silent mysterious vehicle from out of the north, just as Kaarji had described—Jim was not surprised.

He had been almost expecting it.


It was while they were making camp. They were rolling out the fabricoid mats and setting up the little atomo-stoves. Jim missed Kaarji, looked around and saw the Martian at the crest of the long, smooth rise at the foot of which they had stopped.

Jim drew his coat of Praaka fur closer around him and walked out to where Kaarji stood. Not until he had gained the crest of the slight ascent did he see that the Martian was in his strange mood again, standing quite still, staring out to the north.

Jim approached very silently. He stood unmoving by Kaarji's side. Now he almost felt it too, an eerie feeling as though ghostly, insistent fingers were tugging at his brain. Almost, a fascinating wisp of a voice created an urgency within him. But that was imagination! He knew it, even as he drew back.

For a full minute they stood there in silence. Then Kaarji, without even glancing at him, spoke in his curiously clipped monnotone: