Suddenly a column of fire shot up from the volcano, infusing the white mists with a reddish glare. Overhead the three could see Tode. He was flying with a pair of mechanical wings strapped to his shoulders, not more than two hundred feet above them. With a shout of triumph he swooped down. In his hand was a small cylinder, about the mouth of which a phosphorescent violet light was beginning to play. "I've got you, Dent," he screamed in triumph, hovering above the three, while the wings drummed and vibrated till they seemed the mere play of light and shadow about Tode's shoulders. "Halt, or I'll blast your body and soul to hell! Halt, or I'll kill _her_!" The deadly tube was pointing steadily at Lucille's body as Tode hovered ten feet overhead, perfectly still save for the whirring wings. The three stopped dead, and Tode, with a shout of triumph, began calling the Drilgoes, who swarmed forward out of the undergrowth. Huge brown bodies, nude save for their skins of jungle-cat or serpent, they emerged, quickly forming a ring about the three prisoners. Tode fluttered to the ground. "Fools, did you think you could escape that way?" he asked. "As for you, Dent. I'm going to convince you of the reality of four-dimensional space as you would not be convinced in the old days. Do you know what I'm going to do with you? I'm going to strip the skin from you with the ray, and take you into the anatomical room at Columbia University and leave you there as an exhibit, Dent!" Tode grinned like a madman. But Jim was looking past him, at something that had suddenly appeared upon the far horizon. * * * * * It was a round disc of bluish white, a disc like the moon, but slightly smaller, a disc that flickered as if it had an eyelid that was being winked repeatedly. Simultaneously screams broke from the throats of all the Drilgoes. They stampeded. Tode whirled about and saw. With a curse he leaped into the air and whirred away. Out of that disc a slender, blue-white beam shot suddenly, driving a pathway through the fog, and disclosing the dark depths of the valley. "The Eye! The Eye!" screeched Parrish. "Down on the ground! Down! Down!" He dropped, and Jim caught Lucille and flung himself headlong with her. To and fro overhead, but only a few feet above them, moved the searchlight. Shrieks broke from the Drilgoes' throats as they scattered through the jungle. Everywhere that ray moved, trees and undergrowth simply disappeared. A bunch of Drilgoes, caught by it, were obliterated in an instant. Great gaps were left through the undergrowth as the ray passed. It faded as quickly as it had come, and instantly old Parrish was on his feet, dragging at his daughter. "Now! Now!" he babbled, heading along one of the burned tracks through the undergrowth.