into the Negro, but the awful pressure of those simian arms across his back increased till he could no longer breathe. The American was almost gone, the black face blurred, and the continuous snarling of the brute was dull in his ears.

Suddenly Dane went limp. Victory flashed into the red eyes. The squeezing arms relaxed, and in that moment Allan's legs curled around the black's, heels jerking into the hollows behind his captor's knees. At the same instant, levering from that heel hold, Dane butted sharply up against the rocky jaw. All the strength that was left in him went into that trick, and it worked! The Negro crashed backward to the floor. Allan twisted, and rolled free. He was up, looking desperately around for some weapon. But it was not needed; the hulk on the floor never moved. The back of the Negro's head had smashed against the floor, and he was out.

Dane turned and bent to the girl. She, too, was motionless, but to his relief her breast rose and fell steadily. He glanced about looking for water to revive her. Then he saw that this room was sheathed with nullite. Then this was one of the chambers prepared before the plans were changed. But the girl could not be of the fourth couple—the missing two that had never appeared. She was no more than eighteen. And whence had come the giant black who had attacked her?

"Stick up your hands. Quick!"

Allan whirled to the sudden challenge. The man in the doorway was pointing a ray-gun steadily at him! Dane's hands went up, and he gasped inanely: "Who are you?"

"What is going on here? Where did you come from?" The newcomer's English was precise, too precise. No hulking brute, this. A yellow man, slitted eyes slanted and malevolent; broad, flat nose above thin lips that were purple against the saffron skin. The uniform he wore showed signs of some attempt to keep it in repair, and to its threadbare collar still clung a tarnished insignia: the seven-pointed star, emblem of the enemy Allan had fought on a yesterday that was two decades gone.

"Well? Have you lost the power of speech?" The ray-gun jerked forward impatiently.

An obscure impulse prompted Allan's reply. "Almost. I've spoken to no one for twenty years."

"So-o,"—softly. The Oriental's eyes flicked past Dane, and a sudden light glowed in them. "You have been alone for twenty years in this city we thought was empty, but you were on hand to fight with Ra-Jamba for this delightful creature." Something leered from his face that sent the hot blood surging to Allan's temples. The Easterner stepped catlike into the room, shutting the door behind him with his free hand.

"That is true," the American said, with what calmness he could muster. Through the dizzy whirl of his mind he clung to one thought: he must conceal the existence of the little group on Sugar Loaf Mountain at all costs. "I had just discovered that it was safe to leave the room, similar to this, in which I had hidden from the gas, when I heard a scream. I reached here just in time to—"

"To interfere with Ra-Jamba's pleasure, and save the little white dove—for me. My thanks." The yellow man bowed mockingly. "Too bad," he purred, "that you should be robbed of the spoils of your fight." Then he asked irrelevantly. "So some of you Americans found a way to cheat our gas. How many?"

Allan temporized. There had been several similar refuges prepared, he said, but he did not know whether they had been used. This was the first he had visited beside his own. But how was it that the questioner knew so little about what had happened here? Had his people simply laid this country waste and never revisited it?

The Oriental shrugged. "My people are gone, wiped out by your gas as yours were wiped out by ours." He retold Anthony's story. "The crew of my own ship mutinied," he concluded. "We fled north, from that last terrible fight, north, ever north, till at the top of the world we found a little space that was not gas-covered. There was nothing there, just the ice, and the snow, and the cold. We lived there, twelve of us, all men. There were a few bears and seals. We slew them for food—and we grew a little mad. We were men—all men—do you understand?"

As he said this last, his thin voice rose to a shriek, and his eyes darted to the girl's recumbent form. At length, he went on, the gas began to retreat, and they followed it down. They had searched town after town, city after city, had found food in plenty, and all the trappings of civilization. But there was never a living being. And the fever in their blood drove them on.

That very morning the insane search had reached New York. They had landed on the roof of this very building. "We separated to hunt—and Ra-Jamba was the lucky one. But I—Jung Sin—am still luckier." He crept nearer to Allan, and tapped him on the chest with his weapon. "For look you—while those fools used all their ray-gun charges, even the charge of the big tube on our ship, to kill food, I husbanded mine." He laughed shrilly. "So you see, I have the only ray-gun in the world. It shall make me master of the Earth." Again he laughed wildly.

"Now I'm going to kill you." The black cylinder leveled, and Dane stared at death. Alone, he would almost have welcomed it, but the thought of the girl in the filthy power of this beast seared through him. Jung Sin, the little red worms of madness crawling in his brain, paused for a final taunt.

"Let the thought of the white dove in my arms cons—" Allan's sandaled foot shot out into the man's stomach. In the same movement his hands came down, one snatched at and caught the ray-gun, the other smashed into the yellow face. Jung Sin lifted to the drive of fist and foot, crashed into the wall, fell to its foot. From the crumpled heap rose a shriek, a long piercing wail that ended in a gurgle.

Dane froze, the captured cylinder in his hand, and listened. There were others of the unholy band about. Had they heard? Dim sounds came to him. He leaped to the door, flung it open. Faint footfalls, a distant shout, came from far down the corridor, away from the direction of the stairs. Allan glimpsed dark forms, rushing toward him. He darted back to the girl, swung her, still unconscious, to his shoulder, and was out. The floor was slippery beneath his feet. He reeled as he ran, and the sounds of pursuit gained on him. The heavy burden weighed him down, the dim hallway stretched endlessly before him. From close behind came hoarse, guttural shouts that chilled him.

The pack was not twenty feet away when Allan reached the stair door. He slammed it behind him, heard the latch click. He mounted the narrow, winding steps with the last dregs of energy draining from him, and heard a crash below that told of the collapse of the barrier. But he had reached his plane, had flung the girl into it, and was pulling himself in when the first of the pursuers burst out on the roof.

Allan thrust home the throttle, the helio-vanes whined, and his 'copter leaped skyward. He glimpsed men running across the roof; they vanished behind a leafy arbor. Dane turned the nose of his craft toward Sugar Loaf, amethyst in the haze of distance, but from that green arch a black aircraft zoomed up and shot after him. The American shook his head free of the cobwebs of fatigue, and veered westward. He must not lead the Easterners to Anthony's refuge.

Through the dead air, over a dead world they shot—Allan's white flier and the ebony plane with the bloody emblem of the seven-pointed star emblazoned on its nose. Allan wheeled again as the pursuers reached his level on a long, climbing slant.

But they continued rising! They, were five hundred, a thousand feet above him. Then they leveled out, and dived down. Their strategy flashed on him—they were planning to shepherd Dane down, to force him to land where they would have him at their mercy. And their craft was the faster!