"Maybe it isn't poison. It could be a sleeping drug," Loto said. "Sure! To knock me out and vivisect me!" Nixon rasped grimly. "What difference?" * * * * * For a time longer they discussed the details of their plan, while Nixon sat fighting the weird feelings that were sweeping him. Then Nona and Loto quietly left, walking out between the upstanding purple bars. And Nixon was alone, waiting for moon-rise.... This cursed sickness! He fought with it. He was bathed in cold sweat now, with a shuddering chill creeping through him. But it was some hours since he had had anything to eat or drink. He'd certainly take nothing more. The minutes slowly dragged, with an apprehension of tenseness in the waiting Nixon. Now doubts were assailing him. Would Greev be suspicious, with Nona coming up to visit him tonight when she had always refused before? Would Loto be able to get into the control room unseen? Sometimes Gorts were around up there. Would they oppose him? And where was Tork tonight? At this time, almost always he was in his apartment in one of the pyramid-cities. Frane now was in his laboratory; Tork would join him there later. But sometimes Tork vanished on one of his mysterious missions. And it occurred to Nixon that possibly tonight, with poison slowly overcoming the giant, Tork himself might be planning to do something.... Then Nixon suddenly was aware that out through the glowing purple bars, the stars were paling above the distant cliffs. The moon was rising. The time had come! Nixon still sat quiet, hunched against the face of the rock. Diagonally up over his head, the little entrance of the control room was visible. It glowed with radiance. Occasionally the tiny blob of Greev showed as he moved about. Was Loto already up there? He had said that there were places where he could climb up without using the path. And to a six-inch Orite the ledge up there outside the control room was broken and crag-strewn so that Loto easily could hide. Now Nixon saw the figure of Nona, a pale little blob in the moonlight as she mounted the path. A moment more and she was in the glowing recess with Greev. No Gort had challenged her. Good enough! Another interval and then the guard and Nona came out on the ledge, stood a moment and then moved along it. Loto's chance! Slowly Nixon stood up, stretching as though casually yawning. His head reeled. His ears were roaring. This accursed sickness!... But now he saw the blob of Loto in the control room! Nixon tensed. A sudden humming and hissing of current sounded overhead. The barrage went down! The purple bars of light crackled for an instant and were gone!