The sunlight failed and darkness filled the tent. The wind moaned loudly outside. Cal lay tense, his left hand gripping the gun he had withdrawn from its holster. But there was no movement.
The other had gotten into Maury's sleeping bag and lay with his back to Cal. Facing that back, Cal slowly brought the gun to bear. The only safe thing to do was to shoot the alien now, before sleep put Cal completely at the other's mercy.
Then the muzzle of the gun in Cal's hand sank until it pointed to the fabric of the tent floor. To shoot was the only safe thing—and it was also the only impossible thing.
Ahead of them was the snow-field and the glacier, with its undoubted crevasses and traps hidden under untrustworthy caps of snow. Ahead of them was the final rock climb to the summit. From the beginning, Cal had known no one man could make this final stretch alone. Only two climbers roped together could hope to make it safely to the top.
Sudden understanding burst on Cal's mind. He quietly reholstered the gun. Then, muttering to himself, he sat up suddenly without any attempt to hide the action, drew a storage cell lamp from his pack and lit it. In the sudden illumination that burst on the tent he found his boots and stowed them up alongside his bag.
He shut the light off and lay down again, feeling cool and clear-headed. He had had only a glimpse in turning, but the glimpse was enough. The alien had shoved Maury's pack up into a far corner of the tent as far away from Cal as possible. But the main pockets of that pack now bulked and swelled as they had not since Cal had made Maury lighten his load on the first rock climb.
Cal lay still in the darkness with a grim feeling of humor inside him. Silently, in his own mind he took his hat off to his enemy. From the beginning he had assumed that the only possible aim one of the other race could have would be to frustrate the human attempt to get word back to the human base—so that neither race would know of the two ships' encounter.
Cal had underestimated the other. And he should not have, for technologically they were so similar and equal. The aliens had used a no-time drive. Clearly, they had also had a no-time rescue signalling device like the Messenger, which needed to be operated from the mountaintop.
The alien had planned from the beginning to join the human effort to get up into Messenger-firing position, so as to get his own device up there.
He too, had realized—in spite of his awesome natural advantage over the humans—that no single individual could make the last stage of the climb alone. Two, roped together, would have a chance. He needed Cal as much as Cal needed him.
In the darkness, Cal almost laughed out loud with the irony of it. He need not be afraid of sleeping. The showdown would come only at the top of the mountain.
Cal patted the butt of the gun at his side and smiling, he fell asleep.
But he did not smile, the next morning when, on waking, he found the holster empty.
When he awoke to sunlight through the tent walls the form beside him seemed not to have stirred, but the gun was gone.
As they broke camp, Cal looked carefully for it. But there was no sign of it either in the tent, or in the immediate vicinity of the camp. He ate some of the concentrated rations he carried and drank some of the water he still carried. He made a point not to look to see if the alien was imitating him. There was a chance, he thought, that the alien was still not sure whether Cal had discovered the replacement.
Cal wondered coldly where on the naked mountain-side Maury's body might lie—and whether the other man had recognized the attacker who had killed him, or whether death had taken him unawares.
Almost at once they were on the glacier proper. The glare of ice was nearly blinding. Cal stopped and uncoiled the rope from around him. He tied himself on, and the alien in Maury's warmsuit, without waiting for a signal, tied himself on also.
Cal went first across the ice surface, thrusting downward with the forearm-length handle of his homemade ice axe. When the handle penetrated only the few niches of top snow and jarred against solidity, he chipped footholds like a series of steps up the steep pitch of the slope. Slowly they worked their way forward.
Beyond the main length of the hook rose a sort of tower of rock that was the main peak. The tower appeared to have a cup-shaped area or depression in its center—an ideal launching spot for the Messenger, Cal had decided, looking at it through a powerful telescopic viewer from the wreck of the
Harrier.
A rare launching spot in this landscape of steeply tilted surfaces.
Without warning a shadow fell across Cal's vision. He started and turned to see the alien towering over him. But, before he could move, the other had begun chipping at the ice higher up. He cut a step and moved up ahead of Cal. He went on, breaking trail, cutting steps for Cal to follow.
A perverse anger began to grow in Cal. He was aware of the superior strength of the other, but there was something contemptuous about the alien's refusal to stop and offer Cal his turn. Cal moved up close behind the other and abruptly began chipping steps in a slightly different direction. As he chipped, he moved up them, and gradually the two of them climbed apart.
When the rope went taut between them they both paused and turned in each other's direction—and without warning the world fell out from underneath Cal.
He felt himself plunging. The cruel and sudden jerk of the rope around his body brought him up short and he dangled, swaying between ice-blue walls.
He craned his head backward and looked up. Fifteen feet above him were two lips of snow, and behind these the blue-black sky. He looked down and saw the narrowing rift below him plunge down into darkness beyond vision.
For a moment his breath caught in his chest
Then there was a jerk on the rope around him, and he saw the wall he was facing drop perhaps eighteen inches. He had been lifted. The jerk came again, and again. Steadily it progressed. A strength greater than that of any human was drawing him up.
Slowly, jerk by jerk, Cal mounted to the edge of the crevasse—to the point where he could reach up and get his gloved hands on the lip of ice and snow, to the point where he could get his forearms out on the slope and help lift his weight from the crevasse.
With the aid of the rope he crawled out at last on the downslope side of the crevasse. Just below him, he saw the alien in Maury's clothing, buried almost to his knees in loose snow, half kneeling, half-crouching on the slope with the rope in his grasp. The alien did not straighten up at once. It was as if even his great strength had been taxed to the utmost
Cal trembling stared at the other's crouched immobility. It made sense. No physical creature was possessed of inexhaustible energy—and the alien had also been climbing a mountain. But, the thought came to chill Cal's sudden hope, if the alien had been weakened, Cal had been weakened also. They stood in the same relationship to each other physically that they had to begin with.
After a couple of minutes, Cal straightened up. The alien straightened up also, and began to move. He stepped out and took the lead off to his left, circling around the crevasse revealed by Cal's fall. He circled wide, testing the surface before him.
They were nearing the bend of the hook—the point at which they could leave the glacier for the short slope of bare rock leading up to the tower of the main peak and the cup-shaped spot from which Cal had planned to send off the Messenger. The hook curved to their left. Its outer bulge reached to the edge of a ridge on their right running up to the main peak, so that there was no avoiding a crossing of this final curve of the glacier. They had been moving closer to the ice-edge of the right-hand ridge, and now they were close enough to see how it dropped sheer, a frightening distance to rocky slopes far below.
The alien, leading the way, had found and circled a number of suspicious spots in the glacier ice. He was now a slack thirty feet of line in front of Cal, and some fifty feet from the ice-edge of the rim.
Suddenly, with almost no noise—as if it had been a sort of monster conjuring feat—the whole edge of the ice disappeared.
The alien and Cal both froze in position.
Cal, ice axe automatically dug in to anchor the other, was still on what seemed to be solid ice-covered rock. But the alien was revealed to be on an ice-bridge, all that was left of what must have been a shelf of glacier overhanging the edge of the rocky ridge. The rock was visible now—inside the alien's position. The ice-bridge stretched across a circular gap in the edge of the glacier, to ice-covered rock at the edge of the gap ahead and behind. It was only a few feet thick and the sun glinted on it.
Slowly, carefully, the masked and hidden face of the alien turned to look back at Cal, and the darkness behind his faceplate looked square into Cal's eyes.
For the first time there was direct communication between them. The situation was their translator and there was no doubt between them about the meanings of their conversation. The alien's ice-bridge might give way at any second. The jerk of the alien's fall on the rope would be more than the insecure anchor of Cal's ice-hammer could resist. If the alien fell while Cal was still roped to him, they would both go.
On the other hand, Cal could cut himself loose. Then, if the ice-bridge gave way, Cal would have lost any real chance of making the peak. But he would still be alive.
The alien made no gesture asking for help. He merely looked.
Well, which is it to be?
the darkness behind his faceplate asked. If Cal should cut loose, there was only one thing for the alien to do, and that was to try to crawl on across the ice-bridge on his own—an attempt almost certain to be disastrous.
Cal felt a cramping in his jaw muscles. Only then did he realize he was smiling—a tight-lipped, sardonic smile. Careful not to tauten the rope between them, he turned and picked up the ice axe, then drove it into the ice beyond and to his left. Working step by step, from anchor point to anchor point, he made his way carefully around the gap, swinging well inside it, to a point above the upper end of the ice-bridge. Here he hammered and cut deeply into the ice until he stood braced in a two-foot hole with his feet flat against a vertical wall, lying directly back against the pull of the rope leading to the alien.
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.
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.