The cameos he glimpsed, in his swift passage through the City, confused as much as enlightened him. Many of the buildings had large transparent areas, and through these he caught brief, tantalizing views of their inhabitants. Once he saw a large group of them standing around a circular trough, full of redly fuming liquid, sipping it through their flexible trunks. That was understandable enough; but what was the heavy green mist that formed a complete blanket over the lower half of the room?

  And there was one building inside which gravity seemed to have gone mad. He could see planes of glittering material, like faintly shining glass, intersecting at all angles. Figures were walking between or along these planes, with a total disregard for the conventions of "up" and "down." Some were moving straight upward, some at forty-five degrees to the horizontal; and often they would switch nonchalantly through a right angle as their private gravity field tilted and a wall became a floor. Even to an astronaut who had spent much of his career in weightless conditions, the sight was very disturbing.

  There was one completely transparent dome beneath which some kind of demonstration, or game, or artistic performance was in progress. A small circular arena was surrounded by a rather thin crowd of a few hundred spectators, seated in swiveling chairs. What they were looking at was a dazzling-and, to Bowman, eye-wrenching -exhibition of shapes and colors, as if a mad geometrician was displaying his wares.

  Apparently solid figures appeared, merged into each other, changed their perspective, receded to infinity while still remaining at the same spot. Sometimes there were maddening glimpses of what might almost have been another dimension, sometimes surfaces which seemed to be convex suddenly became concave. Once or twice the spectators became very agitated, waving their slender arms in excitement, for no reason that Bowman could see.

  The character of the city was changing; the buildings were becoming smaller and more widely spaced. But ahead of him, still several miles away and partly shrouded in the eternal light haze, was one enormous structure, by far the largest he had seen. From a central dome and spire radiated four main wings separated by four smaller ones, so that the plan of the building roughly resembled a compass rose or a gigantic starfish. It was, Bowman estimated, at least a mile across at the base; and he was traveling straight toward it.

  Then his eye was distracted by another strange sight. The capsule was moving over what appeared to be a broad sheet of shining metal-but no metal, unless it was molten, was corrugated with ripples that traveled back and forth across its surface. He seemed to be flying over a lake of mercury.

  The ripples were produced by small, turtle-shaped machines that moved with slow deliberation over the shining surface, they left behind them broad, corrugated tracks that took several seconds to fade away. And then a huge bulge appeared in the center of the lake, as a thing like a submarine-or a whale?-emerged, and sank back again into the depths.

  Beyond the lake was, at last, something wholly understandable. That great reddish-bronze torpedo could only be a spaceship, so, probably, were the shining crystal spheres and ovoids parked beside it. Small surface vehicles were scurrying to and fro, tiny figures were walking around, and there was even an observation tower surmounted by strange devices and bearing a flashing light. Everywhere and everywhen, Bowman decided, spaceports and airports look much the same, but the fact that these people operated their ships inside city limits showed how far their technology was ahead of Earth's.

  Even while he was passing, one of the crystal spheres began to ascend, as effortlessly and as silently as a balloon. It rose straight upward, at a perfectly constant speed, until it was lost in the darkness of the sky. Bowman's thoughts traveled with it, and for a few moments he was almost overwhelmed by a devastating nostalgia for Earth.

  It swiftly passed, for now he had something else to think about. That gigantic star-shaped building was looming up ahead.

  SCRUTINY

  Now the capsule was climbing again, and the central tower was looming above him, like a mountain piercing the clouds. And it was a very strange mountain, for it seemed made of glass or crystal, shot through with myriads of dark lines and threads, along many of which moved tiny nodes of light-some slowly, some at dazzling speed.

  As a swallow may glide into its nest high up among the spires and buttresses of some great cathedral, so the capsule merged into the central tower. What from a distance had seemed merely a detail of the intricate ornamentation expanded until it was a circular tunnel, about ten feet in diameter. It was a fairly close fit, but the capsule raced along it with unchecked speed and for the first time Bowman noticed a blue line of light glimmering faintly in the air before him, presumably acting as his guide. The tunnel was driven through some translucent material, so that it seemed to Bowman that he was hurtling into the heart of an iceberg-if one could imagine an iceberg that coruscated not with blues and greens, but with pale reds and golds. He could glimpse other shapes moving around him in all directions, vertically and horizontally, apparently in adjoining tunnels, but it was impossible to see them clearly.

  Then he burst out into a large cavity blown like a bubble in the ice. It was a roughly hemispherical chamber about a hundred yards across, with walls of constantly changing curvature, so that they were sometimes concave, sometimes convex. He was moving along a transparent plane about fifty feet above the floor, and there were other equally transparent planes above and below him.

  Some were stationary, some mobile, carrying with them curious small structures and enigmatic pieces of machinery. The spectacle was confusing, yet orderly; and it was here, separated from him by the sliding crystal floors, that Bowman saw his first wholly non-humanoid intelligences.

  Overhead, moving in a closely packed formation, were six squat cones, supported on dozens of tiny, tubelike legs. They looked rather like sea anemones walking on their tentacles, and Bowman could observe no signs of any sense organs. Around the middle of each cone was a white belt that seemed to be made of fur, and bore metal plates covered with angular hieroglyphics.

  The capsule whisked past several of the snake-scaled humanoids, who this time turned to look at him with unconcealed interest. Then Bowman noticed, about two floors below, a most impressive creature like a giant praying mantis, hung with jewel-like ornaments or equipment, that went striding swiftly away, apparently quite oblivious to its surroundings. Its metallic limbs gleamed with the rainbow iridescence of a diffraction grating; Bowman had never seen anything so gorgeous, except for some of the tropical fish of coral reefs.

  He passed quite close to one thing that could have been a robot, or a compound machine- organism, or perhaps a living animal made of metal. It looked like an elegant silvery crab, supported on four jointed legs, each of which terminated in a small, fat wheel; presumably the creature could walk or roll, whichever was more convenient. There was an ovoid body, into which various limbs were now retracted, and the whole was surmounted by a polyhedral head, each facet of which bore a deep-set lens.

  There was one most disturbing entity on which he seemed unable to focus clearly. It was a gently pulsing golden flame, in the heart of which shone three intense and unwavering stars, like a triad of ruby eyes; unless Bowman's senses misled him completely, the thing kept disappearing and reappearing at intervals of a few yards, leaving behind it a ghostly afterimage which took a few seconds to fade away. He could not help wondering if he was looking at some being who existed, at least partly, in another dimension of space or time; there was certainly no remaining doubt that this city wag the meeting place of many worlds.

  There were even some beings who were apparently vegetable. They did not move under their own power, but were supported in little tubs or pans, filled with a glistening, muddy substance out of which their tubular bodies sprouted. At first glance, they looked rather like weeping willows, and their thin yellow tendrils trembled continually as if with ague. They moved in a blaze of light, from a ring of brilliant lamps arranged around them, so that whenever they traveled, they carried w
ith them their own private suns.

  Then he was through the great vaulted chamber and moving along another tunnel, this time a very short one. It ended in a low-ceilinged room, the roof of which appeared to be supported by six metal pillars arranged in a circle. The capsule glided between them, and settled down very gently on the floor, at the exact center of the circle.

  So this, thought Bowman with a controlled but mounting excitement, is the end of the line. Someone-or something-had been to fantastic trouble to bring him here; and for what purpose? In a few minutes, he would know.

  Almost at once he had the sensation of being watched; it was so powerful, so undeniable, that he twisted around and looked over his shoulder. But there was nothing here except the blankly shining pillars; he could not even see any sign of the tunnel through which he had come. The wall surrounding him was seamless and unbroken; there was no entrance, and no way out.

  Then, like a fog creeping through a forest, something invaded his mind, and he knew himself in the presence of overwhelming intellectual power. Beneath that dispassionate scrutiny, he felt neither fear nor hope; all emotion had been leached away.

  Out of the past, forgotten memories came flooding back, as if he was flicking through the pages of a snapshot album. He could see and hear and smell scenes from his childhood, in apparently total recall. Faces he did not even recognize flashed before him, as all the casual acquaintances and experiences of a lifetime went racing past, so swiftly now that he made no attempt to identify them. His whole life was unreeling, like a tape recorder playing back at hundreds of times normal speed.

  Suddenly, like an illuminated glass model, he saw Discovery-in fantastic detail with all its veins and arteries of electrical wiring, fuel lines, air and hydraulic systems, control circuits. Some parts were sharp and clear, others fuzzy and blurred. These, he presently realized, were the areas with which he was not familiar, he could see nothing that he did not know. It was as if, for some unfathomable reason, he had set himself the task of mentally picturing the ship-and had succeeded in doing so to an extent altogether beyond his normal abilities. But that again might be an illusion; perhaps he only thought he was doing this-

  And then came something that could not possibly be real. He was no longer inside the pod-or even inside his clothes. He was standing outside it, naked, looking through the window at his own frozen image at the controls.

  Nor was that all. Though he could not alter the direction of his gaze, he knew that he was completely transfixed with a luminous, three-dimensional grid-a close-packed mesh of thin horizontal and vertical lines. For a moment he felt like a suspect in a police precinct, standing in front of a measuring chart. Then the impression passed as swiftly as it had come, and he was back inside the pod.

  At the same instant, the vehicle was lifted off the floor, and carried silently out of the chamber, away from the ring of metal pillars. Once again it was swept along luminous corridors, once again Bowman saw the alien shapes coming and going in the passageways of the great hive around him-though now they no longer seemed so strange. Then, before he had realized what was happening, he had shot out of the building and was rising vertically through the glowing submarine twilight. He caught one brief glimpse of the city through which he had passed; then it was lost in the mists below him as he was carried back toward the sky.

  SKYROCK

  The empty ocean rolled on beneath him, unmarked by ships or islands. Once or twice Bowman saw underwater shapes that might have been tightly packed schools of fish, or single marine beasts of appalling size; but nowhere was there any sign that this world held a civilization. He waited patiently, still under the influence of the strange euphoria that had gripped him when he left Jupiter V: he felt no hunger or fatigue, merely a vast and childlike wonder, and a readiness to accept anything that might come.

  What came next was a long, low cloud-the first that Bowman had seen in this planet's pure and empty sky. Then, as it rose clear of the horizon, he realized that it was not cloud at all. Though its edges were irregular, they were sharply defined, it was also tinted with greens and browns and blacks, while here and there a few points sparkled like glass in the now almost level rays of the sun. And it seemed to be balanced at its center, like a one legged table, on a single slim blue-green column rising from the sea.

  It was some time before Bowman, dazed with wonders, realized that everything he now saw was perfectly familiar-but impossibly located. That low cloud was an island, its edges showing somber hues of earth and rock and stone. He absorbed this fact thankfully; later, he might start to worry about the minor problem that it was hanging motionless in the sky, linked to the sea beneath only by the dubious support of an eternally descending waterfall.

  As he drew nearer, the details of the floating land became sharper; he could see that much of it was covered with vegetation, above which metallic towers and white domed buildings projected at infrequent intervals. There was a range of low hills near the center, from one of them a thin plume of vapor spiraled gently up into the almost cloudless sky.

  At the same moment, Bowman became aware of two other facts. One was that the central waterfall-as he had tentatively labeled it-showed no signs of movement. Though it seemed to be made of water, that water was motionless; it was a frozen column of liquid, two or three miles in height; and it merged without a splash into the unruffled sea.

  The second fact was that the flying land was not alone; it was surrounded by dozens of small satellites, hovering equally fixed in the sky. No-not quite fixed, some were drifting very slowly in different directions, like ships making their way through a crowded harbor. And presently Bowman could see that they appeared small only because of their overwhelming background; for he was heading directly toward one, and it began to fill his sky.

  The thing was a huge rock, or an uprooted mountain about a mile long and a thousand feet in thickness. Its flattened upper portion was elaborately landscaped into terraces and lawns and pools and little groves of exotic trees, with here and there wide open spaces in which stood enigmatic shapes that might have been statues, or motionless living creatures, or brooding machines. In one place a river flowed to the edge of the rock-yet refrained from leaping out into space toward the ocean miles below. Instead, it continued down and under the rough, craggy surface, as if glued to it by some force more powerful than gravity.

  And some such force must certainly be operating here- for all these millions of tons of rock were hanging unsupported in the sky. This microcosm of a world was poised between sea and space, one member of an archipelago of aerial islands.

  There was sky above and below it, and a gentle wind was disturbing the branches of the strange trees, yet this flying rock seemed as firmly anchored in the empty air as if it rested upon some great mountain peak. And the pod was descending toward it.

  It came to rest on a large, perfectly smooth lawn about a hundred feet square, surrounded by trees with foliage consisting of flat, circular plates, piled one above the other. The lawn was colored a bright green that at first sight seemed to be that of grass, but was really due to tiny plants like multi-leaved clover.

  It was some time, however, before Bowman noticed such details, for he had eyes only for the other vehicle lying on this flat clearing among the trees. Iridescent apparently made of metal, it was a smooth projectile flaring to a point at either end. There were no windows, no sign of a door, no hint of any method of propulsion- only a few symmetrical bulges equally spaced around one end of the hull. Yet even in repose, it appeared ready to hurl itself at the stars; as Bowman gazed at it, he found to his surprise that his sense of wonder was not yet wholly satiated. There was a tingling in his blood as he stared at this symbol of power and speed, so close at hand. It was separated from him by only fifty feet of space; but by how many centuries of time?

  Then his heart almost missed a beat; for he saw that there were people watching him from the shadow of the strange trees.

  He did not hesitate to call them people, thou
gh by the standards of Earth they would have seemed incredibly alien. But already, his standards were not those of Earth he had seen too much, and realized by now that only a few times in the whole history of the Universe could the fall of the genetic dice have produced a duplicate of Man. The suspicion was rapidly growing in his mind-or had something put it there?-that he had been sent to this place because these creatures were as close an approximation as could readily be found to Homo sapiens, both in appearance and in culture.

  There were five of them, and because he had no sense of scale it was some time before he realized that they were extremely tall-perhaps eight or nine feet high. Their bodies were quite slender, and roughly human in proportion, but he could not even guess at the details of their anatomy, because from the neck down they were completely covered by a network of phosphorescent threads that glittered and sparkled like a field of stars.

  Even the fact that they possessed necks was not something that could be taken for granted; Bowman remembered the discussions he had heard about the advantages of fixed heads with omnidirectional vision. These creatures, however, followed the human pattern in having only two eyes, set in very large, elliptical sockets that sloped downward from where the nose should have been.