The alien had followed Cal’s movements with his gaze. Now, as he saw Cal bracing himself, the alien moved forward and Cal took up the slack in the rope between them. Slowly, carefully, on hands and knees like a cat stalking in slow motion a resting butterfly, the alien began to move forward across the ice-bridge.
One foot—two feet—and the alien froze suddenly as a section of the bridge broke out behind him.
Now there was no way to go but forward. Squinting over the lower edge of his faceplate and sweating in his warmsuit, Cal saw the other move forward again. There were less than ten feet to go to solid surface. Slowly, the alien crept forward. He had only five feet to go, only four, only three—
The ice-bridge went out from under him.
X
The shock threatened to wrench Cal’s arms from their shoulder-sockets—but skittering, clawing forward like a cat in high gear, the alien was snatching at the edge of the solid ice. Cal suddenly gathered in the little slack in the line and threw his weight into the effort of drawing the alien forward.
Suddenly the other was safe, on solid surface. Quickly, without waiting, Cal began to climb.
He did not dare glance down to see what the alien was doing; but from occasional tautenings of the rope around his shoulders and chest, he knew that the other was still tied to him. This was important, for it meant that the moment of their showdown was not yet. Cal was gambling that the other, perhaps secure in the knowledge of his strength and his ability to adapt, had not studied the face of this tower as Cal had studied it through the telescopic viewer from the Harrier.
From that study, Cal had realized that it was a face that he himself might be able to climb unaided. And that meant a face that the alien certainly could climb unaided. If the alien should realize this, a simple jerk on the rope that was tied around Cal would settle the problem of the alien as far as human competition went. Cal would be plucked from his meager hand and footholds like a kitten from the back of a chair, and the slope below would dispose of him. He sweated now, climbing, trying to remember the path up the towerside as he had planned it out, from handhold to handhold, gazing through the long-distance viewer.
He drew closer to the top. For some seconds and minutes now, the rope below him had been completely slack. He dared not look down to see what that might mean. Then finally he saw the edge of the cup-shaped depression above him, bulging out a little from the wall.
A second more and his fingers closed on it. Now at last he had a firm handhold. Quickly he pulled himself up and over the edge. For a second perspiration blurred his vision. Then he saw the little, saucer sloping amphitheater not more than eighteen feet wide, and the further walls of the tower enclosing it on three sides.
Into the little depression the light of K94 blazed from the nearly black sky. Unsteadily Cal got to his feet and turned around. He looked down the wall he had just climbed.
The alien still stood at the foot of the wall. He had braced himself there, evidently to belay Cal against a fall that would send him skidding down the rock slope below. Though what use to belay a dead man, Cal could not understand, since the more than thirty feet of fall would undoubtedly have killed him. Now, seeing Cal upright and in solid position, the alien put his hands out toward the tower wall as if he would start to climb.
Cal immediately hauled taut on the line, drew a knife from his belt and, reaching as far down as possible, cut the line.
The rope end fell in coils at the alien’s feet. The alien was still staring upward as Cal turned and went as quickly as he could to the center of the cup-shaped depression.
The wind had all but died. In the semi-enclosed rock depression the reflected radiation of the star overhead made it hot. Cal unsnapped his pack and let it drop. He stripped off the gloves of his warmsuit and, kneeling, began to open up the pack. His ears were alert. He heard nothing from outside the tower, but he knew that he had minutes at most.
He laid out the three sections of the silver-plated Messenger, and began to screw them together. The metal was warm to his touch after being in the sun-warmed backpack, and his fingers, stiff and cramped from gripping at handholds, fumbled. He forced himself to move slowly, methodically, to concentrate on the work at hand and forget the alien now climbing the tower wall with a swiftness no human could have matched.
Cal screwed the computer-message-beacon section of the nose tight to the drive section of the middle. He reached for the propulsive unit that was the third section. It rolled out of his hand. He grabbed it up and began screwing it on to the two connected sections.
The three support legs were still in the pack. He got the first one out and screwed it on. The next stuck for a moment, but he got it connected. His ear seemed to catch a scratching noise from the outside of the tower where the alien would be climbing. He dug in the bag, came out with the third leg and screwed it in. Sweat ran into his eyes inside the mask faceplate, and he blinked to clear his vision.
He set the Messenger upright on its three legs. He bent over on his knees, facemask almost scraping the ground to check the level indicator.
Now he was sure he heard a sound outside on the wall of the tower. The leftmost leg was too long. He shortened it. Now the middle leg was off. He lengthened that. He shortened the leftmost leg again… slowly… there, the Messenger was leveled.
He glanced at the chronometer on his wrist. He had set it with the ship’s chronometer before leaving. Sixty-six ship’s hours thirteen minutes, and… the sweep second hand was moving. He fumbled with two fingers in the breast pocket of his warmsuit, felt the small booklet he had made up before leaving and pulled it out. He flipped through the pages of settings, a row of them for each second of time. Here they were… sixty-three hours, thirteen minutes—
A gust of wind nipped the tiny booklet from his stiffened fingers. It fluttered across the floor of the cup and into a crack in the rock wall to his right. On hands and knees he scrambled after it, coming up against the rock wall with a bang.
The crack reached all the way through the further wall, narrowing until it was barely wide enough for daylight to enter—or a booklet to exit. The booklet was caught crossways against the unevenness of the rock sides. He reached in at arm’s length. His fingers touched it. They shoved it a fraction of an inch further away. Sweat rolled down his face.
He ground the thickness of his upper arm against the aperture of the crack. Gently, gently, he maneuvered two fingers into position over the near edge of the booklet. The fingers closed. He felt it. He pulled back gently. The booklet came.
He pulled it out
He was back at the Messenger in a moment, finding his place in the pages again. Sixteen hours—fourteen minutes—the computer would take four minutes to warm and fire the propulsive unit.
A loud scratching noise just below the lip of the depression distracted him for a second.
He checked his chronometer. Sixty-three hours, sixteen minutes plus… moving on toward thirty seconds. Make it sixty-three hours sixteen minutes even. Setting for sixty-three hours, sixteen minutes plus four minutes—sixty-three hours, twenty minutes.