"You'll kill him!" Mich'l shouted. And then he ventured to turn his head to look at the Gate. He saw the first of the fugitives struggle into the narrow crack. The gate seemed to have stuck, and there was barely room to pass. Ilgen, half conscious, was trying to rain blows on Mich'l's back, compelling him to stop and pass the officer's hands through the belt of his tunic and to manacle them with a pair of bracelets which he found in his pocket. As he staggered toward the Gate with his burden, he saw Gobet beside him, the stolen riot-ray menacing the soldiers, who would otherwise have rushed in. * * * * * Suddenly Ilgen struggled upright. "Fire," he commanded in stentorian tones. "They'll kill you too, you fool!" Mich'l exclaimed angrily. "I am a soldier!" Ilgen answered with contempt. His legs barely supported his weight, and he was struggling to free his manacled hands. He threw himself into the narrow crevice of the Gate, to obstruct the stream of fugitives. He started to shout again: "Fi--" Crack! Again Mich'l's fist caught him. He hooked the officer's elbows over two of the bosses, so that he was supported in plain sight of his men, and turned to urge haste. The last two stragglers were hurrying through, and with relief Mich'l turned to follow. But he set the closing mechanism in motion before he leaped for the narrow opening that was becoming still narrower, though very slowly. Now for that green crescent of light, and hope! He felt a wave of heat. Glancing back, he saw the irresolute guards scattered by the enraged charge of a square, blocky man in civilian robe--the usually smiling Provisional President, Senator Mollon. Mollon himself was fumbling with the lever of the riot-ray. Ilgen had evidently reported where he was going before starting in pursuit of the technies. Again that withering flash of heat, and Mich'l saw Captain Ilgen, still semi-conscious, suddenly turn red-faced. Mollon would burn him up without compunction, in the hope of catching one of the fugitive technies. And now a figure in uniform leaped forward at Mollon's angry gesture, and bent purposefully to the sighting tube. The crescent was now so slender that Mich'l had to turn sideways to squeeze back into the corridor. And slowly, inexorably, it was growing smaller still. With desperate haste the practiced, uniformed man was adjusting his range. Captain Ilgen struggled when Mich'l seized him. "I arrest--" Mich'l thought for a sickening moment that he was caught in the closing gate. Then he was free in the cylindrical tunnel into which the plug was creeping. Luckily, Ilgen was slight. His body squeezed through with little more difficulty than Mich'l's own. Now the opening was too small for any man's body. A red glow illuminated that narrowing slit; an acrid wave of heat, and the smell of burnt metal came with the strong current of air that blew out of Subterranea. * * * * *