The scene ahead was a still-life painting. It seemed incongruous that somewhere among the quiet rocks death moved in the form of a man. He decided against penetrating further into the tangle of rocks. He'd wait. He settled back, conscious that time was fleeing. "Skipper, are you checking your oxygen?" The Chief's voice rattled against his eardrums. It was filled with alarm. "Listen, I have no time--" Crag started to growl. His words were clipped short as his eyes involuntarily took the reading of his oxygen gauge. Low ... low. He calculated quickly. He was well past the point of no return--too low to make the long trip back to Bandit. He was done, gone, a plucked gosling. He had bought himself a coffin and he'd rest there for all eternity--boxed in by the weird tombstones of Crater Arzachel. Adam Crag--the Man in the Moon. He grinned wryly. Well, at least his quarry was going with him. He wouldn't greet his Maker empty handed. He tersely informed Prochaska of his predicament, then recklessly moved to a high vantage point and scanned the rocks beyond. He had to make every second count. Light and shadow ... light and shadow. Somewhere in the crisscross of light and shadow was a man-form, a blob of protoplasm like himself, a living thing that had to be stamped out before the last of his precious oxygen was gone. He was the executioner. Somewhere ahead a doomed man waited in the docks ... waited for him to come. They were two men from opposite sides of the world, battling to death in Hell's own backyard. Only he'd win ... win before he died. He was scanning the rocky tableau when the sniper moved into his field of vision, far to one side of Crag's position. He was running with short choppy steps, threading between the rocks toward Red Dog. His haste and apparent disregard of exposing himself puzzled Crag for a moment, then he smiled grimly. Almost out of oxygen, he thought. Well, that makes two of us. But he still had to make sure his quarry died. The thought spurred him to action. He turned and scrambled back toward the tip of Backbone Ridge to cut the sniper's escape route. He reached the end rocks and waited. A few moments later he sighted a figure scrambling toward him. He raised his rifle thinking it was too far for a shot, then lowered it again. The sniper began moving more slowly and cautiously, then became lost to sight in a maze of rock outcroppings.