Crag studied the scene. He lay at one end of the great crescent of rock forming Backbone Ridge, the other end of which ended about half a mile from Red Dog. The floor of the crater between the rocket and the nearest rock formations was fairly level and unbroken. The arced formation itself was a veritable jungle of rocks of every type--gnarled, twisted rock that hugged the ground, jutting black pinnacles piercing the sky, bizarre bubble formations which appeared like weird ebony eskimo cities, and great fantastic ledges which extruded from the earth at varying angles, forming black caves against their bases. Whole armies could hide there, he thought. Only the fugitive couldn't hide. Oxygen was still the paramount issue. He'd have to thread his way through the terrible rock jungle to the distant tip of the crescent, then plunge across the open plain to the rocket if he hoped to survive. The distance between the horns of the crescent appeared about three miles. He pondered it thoughtfully, then got on the interphones and outlined his plan to Prochaska. "Okay, I know better than to argue," the Chief said dolefully when he had finished. "But watch your oxygen." Damn the oxygen, Crag thought irritably. He studied the labyrinth of rock into which his quarry had vanished, then rose and started across the plain in a direct line for the opposite tip of the crescent. The first moments were the hardest. After that he knew he must be almost out of range of the sniper's weapon. Perhaps, even, the other had not seen his maneuver. He forced himself into a slow trot, his breath whistling in his ears and his body sodden inside his suit. Perspiration stung his eyes, his leg muscles ached almost intolerably, and every movement seemed made on sheer will power. The whimsical thought crossed his mind that Gotch had never painted this side of the picture. Nor was it mentioned in the manual of space survival. He was thankful that the plain between the two tips of the crescent was fairly even. He moved quickly, but it was a long time before he reached the further tip of the crescent. He wondered if he had been observed from Red Dog. Well, no matter, he thought. He had cut the sniper's sole avenue of escape. Victory over his quarry was just a matter of time, a matter of waiting for him to appear. He picked a vantage point, a high rocky ledge which commanded all approaches to his position. After briefing Prochaska, he settled back to wait, thinking that the fugitive must be extremely low on oxygen.