Then from the blasphemous mouth of the king of gangland there came a shriek of awful fear. The tightening tentacle shut it off in a choking gurgle. Cadorna was captured at last--by a monster he could not see, a monster that struck terror to his craven soul. It was the work of but a moment to free David Shelton from the grip of the other robot. The tortured man tottered into Lina's arms for support. Eddie played with Cadorna now, releasing the grip from his throat and pinioning his arms instead. With rapid fingers he manipulated the controls until the screaming gangster was raised high in the air by the unseen arms of the robot. "Another notch, Al," he chortled. Cadorna yelled anew as the clamps tightened, "For God's sake, kid, quit it! Let me down. I'll do anything you say." "Yeah?" Eddie moved one of the rheostat knobs a trifle. The prince of racketeers was whimpering now, like a baby. The sharp snap of a rib punctured his outcries. "Another notch," said Eddie grimly. But the king of the underworld had fainted. * * * * * An hour later Eddie Vail surveyed the scene complacently. Lina had washed the blood from his head and face and bandaged his wound. Luckily, Cardorna's blow had been a glancing one. The girl was fussing over her father, now, and the scientist was on the point of resenting her attentions; swore he could take care of himself; he wasn't a baby. Carlos and his chief were trussed up like mummies, and had been snarling at each other ever since the Chilean recovered his senses, each blaming the other for their predicament. The robots stood motionless by the wall. This would be a big haul for the police. Plenty of evidence to send Cadorna to the chair now. The murder of Butch Collins, the undersized thug, had been witnessed by three of them. No, four: Carlos would squeal. He was that kind. There would be rejoicing in the underworld too, for Cadorna had many enemies. They'd be killing each other off in droves though, for the leaders of rival gangs would be battling for his place. "Guess we'll have to dump them in the limousine," he remarked to Shelton. "Drive them to the nearest town and turn them over to the authorities." "Yes. Then they can come back for the bodies of the other two." Shelton grimaced as he contemplated the sprawled figures. "What about your robots?" Eddie asked. "Why, I'll go ahead with my original plans, of course." The scientist looked surprised. "Dad!" Lina turned beseeching eyes on Eddie and his heart performed amazingly as he looked into their depths. "And why not?" asked her father dolefully. "They'll insure the peace of the world. They'll--"