"At about this time our experiments opened up another realm of existence, manifesting at a vibratory rate above that of earth. To this new realm we brought workers who built the City of Apex and the palace you are in. But, unfortunately, we brought with us no weapons of offense, and in the new world we had neither the material nor the delicate mechanisms and factories to reproduce them. However, for countless ages there was no rebellion on the part of the workers who, even in A-zooma, had worshipped us as gods. They were born, grew old and died, but we abode forever. Besides, in the City of Apex they were freer than they had ever been before, merely having to furnish our laboratories with certain raw materials and the wherewithal to sustain the blood supply on which our lives depend. But, of late, they have made common cause with the original inhabitants of this plane, the green men--" * * * * * The green men! As if the words were a signal, a dreadful thing happened. Out of a far shadow leaped a lean and hideous monster. To Miles' startled eyes it seemed to grow as it leaped. Thin, unbelievably thin it was, yet swelling at the head. From between two goggle-eyes writhed a rope-like trunk. Twelve feet in the air its head towered over Zoro. "Look out!" screamed the American. Zoro's chair seemed to jump. Too late! Around the tubular container wrapped the snake-like trunk, plucking the wheelchair and its occupant from the floor and dangling them high in air. "Shoot!" cried Zoro. Miles shot. His bullet ploughed through the unbelievably thin body and ricochetted from a pillar beyond. Ward fired with better effect. One of the goggle eyes spattered like glass. Under a fusillade of bullets the monster wilted, giving expression to a weird, shrill cry. Zoro dangled head downwards. To drop from such a height on his skull would probably be fatal. But the monster did not drop him. Instead, in its death agony, its grip tightened, and the Americans witnessed an incredible sight. Before their very eyes the monster began rapidly to shrink. Its tenuous body telescoped together, becoming thinner and thinner in the process, until on the floor there lay the lifeless body of a snake-like creature not more than six inches in length! "Good Lord!" breathed Miles. Zoro who had escaped unscathed from his perilous plight, regarded it with his peculiarly colored eyes. * * * * * "It is a tah-a-la," he said, "and must have entered the room at the same time you did. The green men often capture and train them for hunting. When about to seize their prey their bodies have the power of enormously stretching." Outwardly he seemed unaffected by the danger safely passed and waved away several of his fellows who had wheeled to the spot attracted by the noise of the pistols. The Americans were more shaken. "Perhaps," said Ward, "there is danger of--"