sent grotesque shadows leaping far ahead. The volcanic walls fell away from either side and were gone. Overhead he glimpsed crusty stars that twinkled like diamonds. On all sides were high black walls. The space-flyer had emerged in the giant crater called Copernicus. The down-lash of flames became more furious, lifted the spacer high. Prow jets spat additional flames and sent the nose of the space-flyer angling vertically toward the dim, dark regions of outer space. It held poised on the maelstrom of unleashed flame for an instant like a living thing of metal. He reached down, snapped on the radiation propulsion beam. Instantly the space-flyer began to accelerate. The dark side of the moon was cleft asunder by a puff of high flame that lingered for a moment and then was gone. Only a thin column of shimmering light rose, slim and tall and straight. On its peak a space-flyer was hurtling on its way. Rufus Thallin leaned back in his leathern pilot seat and relaxed. He felt very, very tired. A clicking sound aroused him. He turned to see a space-clad figure emerging from the airlock. The helmet came away and she emerged from the spacesuit like a butterfly from a cocoon. "You—you didn't give me time," said Alyce Marshall, evading his eyes. "Look here!" snorted Rufus Thallin. "There was plenty of time to get out of the lock. What were you doing in there all of that time?" "Thinking," answered Alyce, folding the spacesuit neatly and putting it into place on a nearby rack. "And it was your own fault, Rufus Thallin. It was on account of what you did just before—before— "Anyway, I was thinking that you had deliberately made me hate you all along. But you overdid it, Rufus. Did anyone ever tell you how closely related are the emotions of extreme hate and the emotions of extreme—" "Extreme what?" demanded Rufus Thallin in incredulous amazement. "We can pull through anything, Rufus, if we hold out—together." "Together, Alyce?" he whispered. "You mean it that way? Why, together we could lick the universe."