"Snakes of the Santo!" Friday gasped, the whites of his eyes showing all around. "Then we must be on an asteroid!"

They were. From the far side of the dome ahead of them the asteroid stretched back hard and sharp in Jupiter's ruddy light against the backdrop of black space. It was a craggy, uneven body, seemingly about twenty miles in length, pinched in the middle and thus shaped roughly like a peanut shell. One end had been leveled off to accommodate the dome with its cradled buildings; outside the dome all was untouched. The landscape was a gargantuan jumble of coarse, hard, sharp rocks which had crystallized into a maze of hollows, crevices, long crazy splits and jagged out-thrusting lumps of boulders. Without an atmosphere, with but the feeblest of gravities and utterly without any form of life—save for that within the dome built upon it—it was simply a typical small asteroid, of which race only the largest are globe-shaped.

"Once," the Eurasian went on softly as they took all this in, "this world of mine circled with its thousands of fellows between Mars and Jupiter. I picked it from the rest because of certain mineral qualities, and had this air-containing dome constructed on it, and these buildings inside the dome. Then, with batteries of gravity-plates inserted precisely in the asteroid's center of gravity, I nullified the gravital pull of Mars and Jupiter, wrenched it from its age-old orbit and swung it free into space. An achievement that would command the respect even of Eliot Leithgow, I think. So now you see, Carse; now you know. This is my secret base, this my hidden laboratory. I take it always with me, and I travel where I will."

The Hawk nodded coldly his acceptance of the astounding fact; he was too busy to make comment. He was observing the buildings, the nature of them, the exits from the dome, how they could best be reached.


They stood on the roof of the largest and central building, a low metal structure with four wings, crossing at right angles to make the figure of a great plus mark. The hub was probably Dr. Ku's chief laboratory, Carse conjectured. On each side stood other buildings, low, long, like barracks, with figures of coolies moving in and out. Workshops, living quarters, power-rooms, he supposed: power-rooms certainly, for a soft hum filled the air.

There were two great port-locks at ground level in the dome, one on each side, each sizable enough to admit the largest space-ship and each flanked by a smaller, man-sized lock. To reach them....

"And over there," Dr. Ku's voice broke in, "you see your borrowed ship, the Scorpion. But please don't let it tempt you to cut short your visit with me, my friend. It would avail you nothing even if you reached her, for it requires a secret combination to open the port-locks, and my servants' brains have been so altered that they are physically incapable of divulging it to you. And of course I have offensive rays and other devices hidden about—just in case. All rather hopeless, isn't it? But surely interesting.

"Let us go: I have more. Below, in my main laboratory in the center of this building, there's something far more interesting, and it concerns you, Carse, and me, and also Master Scientist Eliot Leithgow." He let the words sink in. "Will you follow me?"

And so they went below again, down the spider ladder into the corridor. There was nothing else to do: the guards, ever watchful, pressed close behind. But a tattoo of alarm was beating in Hawk Carse's brain. Eliot Leithgow again—the hint of something ominous to be aimed at him, Carse, for the extraction of information he alone possessed: the whereabouts of his elderly friend the Master Scientist.