For a moment Cliff all but fainted, and when he recovered, there was Gnut towering over him, legs almost within reach. He was bending slightly, burning his terrible eyes right into his own!
Too late to try to think of running now. Trembling like any cornered mouse, Cliff waited for the blow that would crush him. For an eternity, it seemed, Gnut scrutinized him without moving. For each second of that eternity Cliff expected annihilation, sudden, quick, complete. And then suddenly and unexpectedly it was over. Gnut's body straightened and he stepped back. He turned. And then, with the almost jerkless rhythm which only he among robots possessed, he started back toward the place from which he came.
Cliff could hardly believe he had been spared. Gnut could have crushed him like a worm-and he had only turned around and gone back. Why? It could not be supposed that a robot was capable of human considerations.
Gnut went straight to the other end of the traveler. At a certain place he stopped and made a curious succession of sounds. At once Cliff saw an opening, blacker than the gloom of the building, appear in the ship's side, and it was followed by a slight sliding sound as a ramp slid out and met the floor. Gnut walked up the ramp and, stooping a little, disappeared inside the ship.
Then, for the first time, Cliff remembered the picture he had come to get. Gnut had moved, but he had not caught him! But at least now, whatever opportunities there might be later, he could get the shot of the ramp connecting with the opened door; so he twisted his camera into position, set it for the proper exposure, and took a shot.
A long time passed and Gnut did not come out. What could he be doing inside? Cliff wondered. Some of his courage returned to him and he toyed with the idea of creeping forward and peeping through the port, but he found he had not the courage for that. Gnut had spared him, at least for the time, but there was no telling how far his tolerance would go.
An hour passed, then another, Gnut was doing something inside the ship, but what? Cliff could not imagine. If the robot had been a human being, he knew he would have sneaked a look, but as it was, he was too much of an unknown quantity. Even the simplest of Earth's robots under certain circumstances were inexplicable things; what, then, of this one, come from an unknown and even unthinkable civilization, by far the most wonderful construction ever seen-what superhuman powers might he not possess? All that the scientists of Earth could do had not served to derange him. Acid, heat, rays, terrific crushing blows-he had withstood them all; even his finish had been unmarred. He might be able to see perfectly in the dark. And right where he was, he might be able to hear or in some way sense the least change in Cliff's position.
More time passed, and then, sometime after two o'clock in the morning, a simple homely thing happened, but a thing so unexpected that for a moment it quite destroyed Cliff's equilibrium. Suddenly, through the dark and silent building, there was a faint whir of wings, soon followed by the piercing, sweet voice of a bird. A mockingbird. Somewhere in this gloom above his head. Clear and full-throated were its notes; a dozen little songs it sang, one after the other without pause between-short insistent calls, twirrings, coaxings, cooings-the spring love song of perhaps the finest singer in the world. Then, as suddenly as it began, the voice was silent.
If an invading army had poured out of the traveler, Cliff would have been less surprised. The month was December; even in Florida the mockingbirds had not yet begun their song. How had one gotten into that tight, gloomy museum? How and why was it singing there?
He waited, full of curiosity. Then suddenly he was aware of Gnut, standing just outside the port of the ship. He stood quite still, his glowing eyes turned squarely in Cliff's direction. For a moment the hush in the museum seemed to. deepen; then it was broken by a soft thud on the floor near where Cliff was lying.
He wondered. The light in Gnut's eyes changed, and he started his almost jerkless walk in Cliff's direction. When only a little away, the robot stopped, bent over, and picked something from the floor. For some time he stood without motion and looked at a little object he held in his hand. Cliff knew, though he could not see, that it was the mockingbird. Its body, for he was sure that it had lost its song forever. Gnut then turned, and without a glance at Cliff, walked back to the ship and again went inside.
Hours passed while Cliff waited for some sequel to this surprising happening. Perhaps it was because of his curiosity that his fear of the robot began to lessen. Surely if the mechanism was unfriendly, if he intended him any harm, he would have finished him before, when he had such a perfect opportunity. Cliff began to nerve himself for a quick look inside the port. And a picture; he must remember the picture. He kept forgetting the very reason he was there.
It was in the deeper darkness of the false dawn when he got sufficient courage and made the start. He took off his shoes, and in his stockinged feet, his shoes tied together and slung over his shoulder, he moved stiffly but rapidly to a position behind the nearest of the six robot attendants stationed along the wall, then paused for some sign which might indicate that Gnut knew he had moved. Hearing none, he slipped along behind the next robot attendant and paused again. Bolder now, he made in one spurt all the distance to the farthest one, the sixth, fixed just opposite the port of the ship. There he met with a disappointment. No light that he could detect was visible within; there was only darkness and the all-permeating silence. Still, he had better get the picture. He raised his camera, focused it on the dark opening, and gave the film a comparatively long exposure. Then he stood there, at a loss what to do next.
As he paused, a peculiar series of muffled noises reached his ears, apparently from within the ship. Animal noises-first scrapings and pantings, punctuated by several sharp clicks, then deep, rough snarls, interrupted by more scrapings and pantings, as if a struggle of some kind were going on. Then suddenly, before Cliff could even decide to run back to the table, a low, wide, dark shape bounded out of the port and immediately turned and grew to the height of a man. A terrible fear swept over Cliff, even before he knew what the shape was.
In the next second Gnut appeared in the port and stepped unhesitatingly down the ramp toward the shape. As he advanced it backed slowly away for a few feet; but then it stood its ground, and thick arms rose from its sides and began a loud drumming on its chest, while from its throat came a deep roar of defiance. Only one creature in the world beat its chest and made a sound like that. The shape was a gorilla!
And a huge one!
Gnut kept advancing, and when close, charged forward and grappled with the beast. Cliff would not have guessed that Gnut could move so fast. In the darkness he could not see the details of what happened; all he knew was that the two great shapes, the titanic metal Gnut and the squat but terrifically strong gorilla, merged for a moment with silence on the robot's part and terrible, deep, indescribable roars on the other's; then the two separated, and it was as if the gorilla had been flung back and away.
The animal at once rose to its full height and roared deafeningly. Gnut advanced. They closed again, and the separation of before was repeated. The robot continued inexorably, and now the gorilla began to fall back down the building. Suddenly the beast darted at a manlike shape against the wall, and with one rapid side movement dashed the fifth robot attendant to the floor and decapitated it.
Tense with fear, Cliff crouched behind his own robot attendant. He thanked Heaven that Gnut was between him and the gorilla and was continuing his advance. The gorilla backed farther, darted suddenly at the next robot in the row, and with strength almost unbelievable picked it from its roots and hurled it at Gnut. With a sharp metallic clang, robot hit robot, and the one of Earth bounced off to one side and rolled to a stop.