The spoken command turned the balance against Quest. His will yielded to the master. At the same instant Philip's body relaxed like an object relieved of a great excess of electrical potential. Suddenly strong and supple, he lifted the trembling Keane and tossed him across his shoulder. For a moment there had been a lull in the assault on the door. Now the battering resumed with a fury that jarred the whole chamber and sent ripples dancing across the varicolored liquids in the osmotic tank. "Quick!" gasped Keane. "Move! I say. Carry me out." But he was in a fainting condition. Crash after crash rocked the chamber, and with every blow Quest's will felt a stimulation that enabled him to stand off the commands of his Control. Then a wave of nausea swept over him and left him reeling. It seemed that Philip's blood had turned to boiling oil. A dazzling mist swallowed him up, and with a weird sense of inflation he felt full strength returning to his will. A booming blow that bulged the door inward acted upon him like a stage player's cue. He leaped to the platform. The gurgling sound of remonstrance rattled from Keane's throat. But Quest paid no heed. Philip was walking the plank--away from the open panel--out over the tank. Rapidly he dropped down the ladder to the bottom rung, snatched Keane's wrist in a gorillalike grip, and hurled him down into the vat. Then Philip was clinging desperately to the ladder, his strength gone, his body shivering as if with ague. "Go on up!" came a strange, impatient voice from below him. "For heaven's sake let me out of here!" * * * * * A downward glance, and with a shout of alarm Philip was scrambling up the ladder, for there was a head down there, and a pair of naked shoulders, and the face of a man he had never seen before. Hand over hand Quest followed. Philip had collapsed and lay prone on the plank. Quest lifted him to his feet and shook him anxiously. "Philip!" he urged. "Philip! Can you walk?" The tattoo on the battered door helped to revive the older man. "Quick!" whispered Quest, kneading Philip's arms. "There's barely an hour left. Get to your office. Burn the papers. Refuse the money. Do you hear me?" Philip nodded dazedly. "Hurry!" puffed Quest, thrusting him through the opening that Keane had reserved for his own escape, and sliding the panel back into place. Quest was himself now--young, strong, free. Instantly he threw the electrolytic switch to minus. For Keane had failed to emerge from the tank, and since he was submerged alone, he could not escape until electrolysis was halted. Just as Quest leaped from the platform to release the airlock, the door burst in and three men with drawn guns rushed into the chamber. The leader stopped with a startled oath and stood blinking his unbelieving eyes. Quest was poised like a statue, his naked body gleaming an unearthly white against the lusterless black of the wall.