They did not stop at the street level; they continued on down another ramp, around a bend, descending an even steeper incline toward the bowels of Jupiter. Their descent ended at last before a huge metal barrier which, at a signal from the leader, drew smoothly up into the ceiling to disclose a gigantic, red-lit chamber underlying the foundations of the building.

In fear and awe, Dex gazed around that huge room.

It resembled in part a nightmare rearrangement of such a laboratory as might be found on Earth; and in part a torture chamber such as the most ferocious of savages might have devised had they been scientifically equipped to add contrivances of supercivilization to the furthering of their primitive lust for cruelty.

There were great benches—head-high to the Earthman—to accommodate the height of the Rogan workmen. There were numberless metal instruments, and glass coils, and enormous retorts; and in one corner an orange colored flame burnt steadily on a naked metal plate, seeming to have no fuel or other source of being.

There was a long rack of cruelly pointed and twisted instruments. Under this was a row of long, delicate pincers, with coils on the handles to indicate that they might be heated to fiendish precision of temperatures. There were gleaming metal racks with calibrated slide-rods and spring dials to denote just what pull was being exerted on whatever unhappy creature might be stretched taut on them. There were tiny cones of metal whose warped, baked appearance testified that they were little portable furnaces that could be placed on any desired portion of the anatomy, to slowly bake the selected disk of flesh beneath them.

Dex shuddered; and a low moan came from Greca, whose clear blue eyes had rested on the contents of this vast room before in her capacity as hostage and interpreter for the inhuman Rogans.

And now another sense of Dex's began to register perception on his brain.

A peculiar odor came to his nostrils. It was a musky, fetid odor, like that to be smelled in an animal cage; but it was sharper, more acrid than anything he had ever smelled on Earth. It smelled—ah, he had it!—reptilian. As though somewhere nearby a dozen titanic serpents were coiled ready to spring!

Looking about, Dex saw a six-foot square door of bars in one wall of the laboratory—like the barred entrance to a prison cell. It was from the interstices of this door that the odor seemed to emanate; but he had no chance to make sure, for now the Rogan leader approached him.

"I will first show you," he said, through his mouthpiece, Greca, "what happens to those who oppose our orders. We have a slave who tried to run away into the surrounding jungles three suns ago...."

A man was dragged into the chamber. He was slightly taller and more stockily muscled than an Earthman might be; but otherwise, in facial conformation and general appearance, he might have come here straight from New York City. Dex felt a great pang of sympathy for him. He was so plainly one of humankind, despite the fact that he had been born on a sphere four hundred million miles from Dex's.

The fellow was paralyzed with horror. His eyes, wide and glazed, darted about the torture room like those of a trapped animal. And yet he made no move to break away from the clutch of the two Rogans who held him. He knew he was helpless, that wild-eyed glance told Dex. Knew it so thoroughly that not even his wildest terror could inspire him to try to make a break for freedom, or strike back at the implacable Rogan will.