"Why, it's like nothing that ever happened," cried the girl when he had finished. And Rod's mind was kindled with a single purpose. He had no idea what he could do--perhaps it was too late now--but he was willing to give his life in an attempt to set these people free. His life was nothing, meaningless to him as he was.... "But I guess we're trapped," he said. "With one of my arms gone, we could never get through that crowd outside." Something was ramming against the door. It shook under the blows and Rod rolled over, putting his weight against it. Ralph had found a thick, metal bar in the room. The massive Daro had procured a hatchet of sorts. The girl stood against the wall, keeping out of the way. The pounding upon the door grew stronger. Finally, with a crash it burst in, flinging Rod across the room. Two Capeks scrambled from the floor where they had fallen. Daro swung his hatchet into a shell and as it spurted red, Ralph did away with the other one. Rod leaped up. Machines were streaming into the room. Rod pulled the eye from the nearest, snatched at another and flung him at the mob in the door. He was fast learning how to steer his powerful body. He thought "speed," and darted into the machines with all the force of his weight. A wave fell, piled at the doorway, barrels smashed. But they were immediately pushed aside as others came. Rod rolled into the helpless fight but, with his single arm, was of little aid. Ralph and Daro swung right and left. But it was a losing battle from the beginning--those fallen were immediately replaced. Finally Daro dropped his hatchet and, at the risk of his life, knelt over a fallen Capek. He unscrewed the right arm, then fought his way to Rod's side. Rod saw his intention and held off the machines with his left as Daro removed his shattered limb, fitted the new arm in the socket. He had almost finished when a tendril caught him by a leg. He was swung high into the air, snapped like a whip. The Capek bashed his somber head against the shell of another machine. Daro died instantly. Rod's brain, the only human element he possessed, melted with hot compassion at the courageous sacrifice, then flamed to blind fury. Like a thing possessed, he screwed the arm home and wheeled into the fray, pounding gigantic blows with balled tendrils. In a moment beneath his onslaught there was not a machine standing in the room. He looked to the door, saw two Capeks jammed there, unable to move. The narrow entrance was blocked. Behind them a horde of machines pressed vainly. Then they drew back, gathered in little groups, shouting and waving their arms. Rod snapped the switches of those stuck in the doorway. "R4, the ruler, has not arrived yet," said Ralph. "Without him, their brains can conceive of no concerted action." "And when he comes?" asked Rod. The tall man mutely pointed to the broken body of Daro upon the floor. * * * * *