Suddenly the girl stopped struggling; her eyes dilated, looking past Gedner's shoulder. In a smothered whisper she exclaimed, "Paul--_look out_!" [Illustration: _In a smothered whisper she exclaimed, "Paul--look out!"_] * * * * * The urgency in her voice made him glance up; in an instant he had released her and spun around. To face Big Bill, who had silently risen half-erect and as silently advanced upon the two. The Woolly's flat head was sunk between his shoulders; his huge three-fingered hands dangled below his shaggy knees, and almost all his resemblance to a man was lost. His red eyes glinted coldly in the bright light. As Gedner wheeled, Big Bill halted his stealthy approach. He reared abruptly to his full seven feet of height, then slowly raised his great mitten-like hands. Leila, in a dazed huddle on the floor, saw the first look of utter stupefaction on Gedner's face replaced by one of scowling mental effort--and then by a dawning horror. Big Bill sank into a tense crouch. Then Gedner threw himself sidewise, and his hand came up with the gun; and in that instant Big Bill went for him in one terrible rolling rush. Before the man's finger could jerk the firing lever, one of those huge three-fingered hands closed on his forearm. There was a snapping, and the flame pistol spun away; Gedner screamed out in agony then, and once again as the Woolly lifted him into the air to smash him down against the iron floor. That was all. Big Bill stood quietly, a stooping white-furred figure with dangling hands, over a red thing on the floor that squirmed painfully and was still. In the silence the sobbing gasps of Leila's own breathing rang in her ears. Knuckles crashed against the door panels, and Mark Paige's voice came in, edged with anxiety--"Hey, Paul!" Leila stirred from her stunned apathy and picked herself off the floor; and then she did the bravest action of her life. With heart banging against her front teeth, she walked across the room and knelt beside the shattered body. The great red eyes of the Woolly looked dully down at her. Fortunately, the key was in the first and most accessible pocket. It took her several tries, with her back to Big Bill, to fit it into the lock. She had picked up the flame pistol and held it in her left hand, pointing away from the door at a wavering angle; that was just as well, for Paige's headlong entry when the door slid open nearly tripped her taut nerves into pulling the trigger. "Hey!" said Paige again in a low voice. His eyes fell on Leila's shaking hand, and he reached across to take the gun away from her and aim it pointblank at Big Bill. There was a strong odor of liquor on his breath, but his hand holding the pistol was perfectly steady. "Shall I shoot him?" he asked almost casually. Leila shook her head numbly. "I--I don't think it's necessary."