"We have in ally in her," murmured Brand. "Though G.o.d only knows if that will mean anything to us...."

CHAPTER IV

_In the Tower_

"What I can't figure out," said Dex, striding up and down the big bare room, "is why we're needed to tell them about the atomic motor.

They've got our ship, and three others besides. I should think they could learn about the motor just by taking it apart and studying it."

Brand grinned mirthlessly, recalling the three years of intensive study it had taken him to learn the refinements of atomic motive power. "If you'd ever qualified as a s.p.a.ce navigator, Dex, you'd know better. The Rogans are an advanced race; their control of polar magnetism and the marvelously high-powered telescopes Greca mentions prove that; but I doubt if they could ever a.n.a.lyze that atomic motor with no hint as to how it works."

Silence descended on them again, in which each was lost in his own thoughts.

How many hours had pa.s.sed, the Earthmen did not know. They had spent the time in fruitless planning to escape from their tower room and go back to the ship again. Though how they could get away in the ship when the Rogans seemed able to propel it where-ever they wished against the utmost power of their motor, they did not attempt to consider.

One of Jupiter's short nights had pa.s.sed, however--a night weirdly made as light as day by red glares from the plates, which seemed to store up sunlight, among their other functions--and the tiny sun had risen to slant into their window at a sharp angle.

Suddenly they heard the familiar drawing of the great bolts outside their door. It was opened, and a dozen or more of the Rogans came in, with Greca cowering piteously in their midst and attempting to communicate her distress to Brand.

At the head of the little band of Rogans was one the prisoners had not seen before. He was of great height, fully two feet taller than the others; and he carried himself with an air that proclaimed his importance.

The tall one turned to Greca and addressed a few high-pitched, squeaky words to her. She shook her head; whereupon, at a hissed command, two of the Rogans caught her by the wrists and dragged her forward.

"They have come to question you," Greca lamented to Brand. "And they want to do it through me. But I will not! I will not!"

Brand smiled at her though his lips were pale.

"You are powerless to struggle," he said. "Do as they ask. You cannot help us by refusing, and, in any case, I can promise that they won't learn anything from us."

The tall Rogan teetered up to the prisoners on his gangling legs, and stared icily at them. Crouched beside him, her lovely body all one mute appeal to the Earthmen to forgive her for the part she was forced to play, was Greca.

At length the Rogan leader spoke. He addressed his sibilant words to Greca, though his stony eyes were kept intently on the Earthmen.

"He says," exclaimed Greca telepathically, "to inform you first that he is head of all the Rogan race on this globe, and that all on this globe must do as he commands."

Brand nodded to show he understood the message.

"He says he is going to ask you a few questions, and that you are to answer truthfully if you value your lives:"

"First, he wants to know what the people of your world are like. Are they all the same as you?"

Dex started to reply to that; but Brand flung him a warning look.

"Tell him we are the least of the Earth people," he answered steadily.

"Tell him we are of an inferior race. Most of those on Earth are giants five times as large as we are, and many times more powerful."

Greca relayed the message in the whistling, piping Rogan tongue. The tall one stared, then hissed another sentence to the beautiful interpreter.

"He wants to know," said Greca, "if there are cities on your globe as large and complete as this one."

"There are cities on Earth that make this look like a--a--" Brand cast about for understandable similes--"like a collection of animal burrows."

"He says to describe your planet's war weapons," was the next interpretation. And here Brand let himself go.

With flights of fancy he hadn't known he was capable of, he described great airships, steered automatically and bristling with guns that discharged explosives powerful enough to kill everything within a range of a thousand miles. He told of billions of thirty-foot giants sheathed in an alloy that would make them invulnerable to any feeble rays the Rogans might have developed. He touched on the certain wholesale death that must overtake any hostile force that tried to invade the planet.

"The Rogan shock-tubes are toys compared with the ray-weapons of Earth," he concluded. "We have arms that can nullify the effects of yours and kill at the same instant. We have--"

But here the Rogan leader turned impatiently away. Greca had been translating sentence by sentence. Now the tall one barked out a few syllables in a squeaky voice.

"He says he knows you are lying," sighed Greca. "For if you on Earth have tubes more effective than theirs why weren't you equipped with them on your expedition here to the red kingdom?"

Brand bit his lips. "Check," he muttered. "The brute has a brain in that ugly head."

The Rogan leader spoke for a long time then; and at each singsong word, Greca quivered as though lashed by a whip. At length she turned to Brand.

"He has been telling what his hordes can do, answering your boasts with boasts of his own. His words are awful! I won't tell you all he said. I will only say that he is convinced his shock-tubes are superior to any Earth arms, and that he states he will now ill.u.s.trate their power to you to quell your insolence. I don't know what he means by that...."

But she and the Earthmen were soon to find out.

The Rogan leader stepped to the window and arrogantly beckoned Brand and Dex to join him there. They did; and the leader gazed out and down as though searching for something.

He pointed. The two Earthmen followed his leveled arm with their eyes and saw, a hundred yards or so away, a bent and dreary figure trudging down the metal paving of the street. It was a figure like those to be seen on Earth, which placed it as belonging to Greca's race.

The tall leader drew forth one of the shock-tubes. Seen near at hand, it was observed to be bafflingly simple in appearance. It seemed devoid of all mechanism--simply a tube of reddish metal with a sort of handle formed of a coil of heavy wire.

The Rogan pointed the tube at the distant figure.

Greca screamed, and screamed again. Coincident with her cry, as though the sound of it had felled him, the distant slave dropped to the pavement.

That was all. The tube had merely been pointed: as far as Brand could see, the Rogan's "hand" had not moved on the barrel of the tube, nor even constricted about the coil of wire that formed its handle. Yet that distant figure had dropped. Furthermore, fumes of greasy black smoke now began to arise from the huddled body; and in less than thirty seconds there was left no trace of it on the gleaming metal pavement.

"So that's what those things are like at full power!" breathed Dex.

"My G.o.d!"

The Rogan leader spoke a few words. Greca, huddled despairingly on the floor, crushed by this brutal annihilation of one of her country-men before her very eyes, did not translate. But translation was unnecessary. The Rogan's icy, triumphant eyes, the very posture of his grotesque body, spoke for him.

"That," he was certainly saying, "is what will happen to any on your helpless planet who dare oppose the Rogan will!"