Gordon Dickson - The Human Edge

Cold logic washed the fantasy from Cal’s mind. This being trudging almost shoulder to shoulder with him was the same creature than had sent Doug’s limp and helpless body skidding and falling down the long ice-slope to the edge of an abyss. This companion alongside was the creature that had stalked Maury somewhere among the rocks of the mountainside and disposed of him, and stripped his clothing off and taken his place.

Moreover, this other was of the same race and kind as the alien who had clung to the hull of the falling Harrier and, instead of trying to save himself and get away on landing, had made a suicidal attack on the eight human survivors. The last thing that alien had done, when there was nothing else to be done, was to try to take as many humans as possible into death with him.

This member of the same race walking side by side with Cal would certainly do no less.

But why was he waiting so long to do it? Cal frowned hard inside his mask. That question had to be answered. Abruptly he stopped. They were through the big rubble of the moraine, onto a stretch of gravel and small rock. The sun was already partly out of sight behind the mountain peaks. Cal untied the rope and began to unload the pup tent.

Out of the corner of his eyes, he could see the alien imitating his actions. Together they got the tent set up and their sleeping bags inside. Cal crawled in the tiny tent and took off his boots. He felt the skin between his shoulder blades crawl as a second later the masked head of his companion poked itself through the tent opening and the other crept on hands and knees to the other sleeping bag. In the dimness of the tent with the last rays of K94 showing thinly through its walls, the shadow on the far tent wall was a monstrous parody of a man taking off his boots.

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 Cal lay tense, his left hand gripping the gun he had withdrawn from its holster.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.