“We’ll lose a lotta time back trailin’ from here. I’d say keep on.”

But they continued the descent cautiously and when Dard disturbed a small stone, which dropped noisily over the edge, he stiffened for several listening seconds. There was no sound from below-nothing but that terrible stomach-disturbing odor.

Santee unslung the rifle, and Dard’s hand went to his own belt. That morning Cully had given him the ray gun, suggesting that it could be of more use to the foot travelers. Now, as his hand closed around the butt, Dard was very glad that he held it. There was something about this ill-omened place-something in the very silence which brooded there-that hinted of danger.

A screen of stubby thorn bushes masked the far end of the narrow ravine, hinting at the presence of moisture, although the prickly leaves had a grayish, unhealthy cast.

The two worked their way through these as carefully and noiselessly as possible and found a seeping spring. Minerals salted the lip of the water-filled depression, and a greenish powder was dry along the banks of the rivulet which trickled on down the valley.

Chemical fumes from the water scented the air, but not heavy enough to cover the other sickish effluvium.

They should have beaten their way through the brush to the other side of the valley and climbed out of that tainted hole. But no broken ledges hung over there to furnish climbing aids, and they followed the stream along in the search for an easier path.

The contaminated water spilled out into a shallow stinking pool with a broad rim of the poisonous green.

Grouped around the far perimeter of the pool, half buried in the sand, were such things as nightmares are made of! Their dingy yellowish-green skins were scaled with the stigmata of the reptile. But the creatures drowsing in the sun were not even as wholesome as the snakes most humans shrink from with age-old inbred horror. These were true monsters-evil. Gorged, they had fallen in a stupor among the grisly fragments of their feasting, and from those fragments and the smeared sand came a stench foul enough to suggest that this was a long used lair.

Dard estimated that they were from seven to ten feet long. The hind legs, ending in huge webbed feet, mere stems of bone laced with powerful driving muscles. Short, horribly stained forearms had terrible travesties of human hands which curved over their protruding bellies, each finger a ten-inch claw. But their heads were the worst, too small for the bodies, flat of skull, they were mounted on unusually long and slender necks, giving the impression of a cobra on the shoulders of a lizard.