Don Merriam had eaten and slept once more in his tiny cabin aboard the Wanderer, when he woke with a feeling of great inner clarity. He gazed tranquilly at the neutral-colored ceiling as it lightened.

He did not feel the bed under him and was barely aware of his body  -  the little nerve messages of touch and tension were at a minimum. Insofar as he could tell at all, he was stretched on his back with his arms straight and relaxed at his sides.

Suddenly he was filled with a boundless curiosity about the great ship on which he was an involuntary passenger. His whole being was suffused with the yearning to know, or if that were impossible, at least to see. This feeling was most intense, yet he felt no impulse to work it out in grimacings and gestures and muscular strainings.

Without warning, the ceiling swiftly descended toward him.

He tried to throw himself off the bed, but the only result was that he turned over, very smoothly, and saw by the bottom of the wall and the pattering shower area that he was about six feet above them.

The ceiling had not moved. He was floating in the air, first on his back, now on his face, two feet below the ceiling.

His chin was tipped forward and his head bent back, though without any sensation of strain, so that his vision was directed straight ahead, like the point of a spear. He couldn't look down at any part of the bed beneath him, although he tried to, because he wanted to know whether he would see his body lying there  -  whether a real body or a body in a dream.

Nor could he bring his hands in front of his face to look at them. Either he was unable to feel and move his arms, or else he had none.

He couldn't tell whether he had a real body up here, or even a dream body, or whether he was only a levitating viewpoint with an imagined body behind it.

One bit of evidence for the last: he couldn't seem to see in the periphery of his vision the dim edges of nose and brow and cheek that one normally sees and ignores. But perhaps that was only because his vision was directed so fiercely forward.

All at once he began to move swiftly in that direction, straight toward the wall. He flinched his eyes shut  -  he could do that, at least, or somehow momentarily turn off his vision  -  and when he opened them, although there had been no blow, not the least sensation of resistance, he was flying rapidly along a silver corridor etched with arabesques and hieroglyphs. It opened almost at once into one of the great pits or wells, and with a sudden rush of exultation he plunged down.

In this way there began for Don Merriam an experience that might be pure vivid dream, or a dream induced in him by his captor-hosts, or a clairvoyant extrasensory experience presented to him in the form of a flying dream, or even  -  and this was how it felt  -  that his body had been made perfectly permeable to all walls and airs and other barriers by an alien physics and chemistry, and immune to gravity and all other ordinary forces, and whirled and swooped about, half involuntarily yet guided to a degree by its mind's raging curiosities, on a wonderful nightmare journey.

Or perhaps, it occurred to him, this was all taking place in a single instant, outside time.

Don Merriam could not tell which of these, or some yet unimagined other, was the basis of his experience. He could only flit and plummet and see.

At first his movements were limited to empty corridors and shafts. Or if there were beings or perambulating machines or small ships in them, they were blurred to invisibility by the speed of his passage. The rule was that for a few instants he would travel almost as fast as light, it seemed, aware only of the general shape and attitude of the passageway he was traversing; then he would float rather slowly for a brief space, able to glimpse all that was immediately around him; then he would dart off again, in part involuntarily, in part because an imperious urge to see something else would take hold. This process went on interminably, yet without weariness or boredom, as though time were unlimitedly telescoped.

Gradually the three-dimensional picture firmed in his mind of the Wanderer, artificial throughout, globe within globe of floors  -  fifty thousand of them at least  -  everywhere veined with corridors, like a vast silvery sponge. Many of the great wells did go all the way through the planet, intersecting at its center in an immense empty globe that had a dark sky of its own glittering with random lights like stars between the mile-wide holes of the pits with their darkness and their softly glimmering lights.

But although his imagination surged delightedly with its increasing grip on the structure of the Wanderer, one feature of the planet oppressed and then began to frighten him, more by its implications than by its simple nature: the thirty-yard-thick skin of dark metal that was its silver-filmed roof  -  the ground on which the Baba Yaga and the Soviet moon ship had landed  -  and the mile-wide rounds of equally thick metal set to swing across the mouths of the pits, sealing up the planet like a fortress.

Re-enforcing this particular ominousness were sets of great coils circling some of the planet-piercing pits, as if the pits might sometimes serve as monstrous linear accelerators.

Recoiling inward from the forbidding armor plating, Don found himself again in the very center of the star-speckled, central immensity. It might be only twenty miles across, but now it seemed a universe, and the great holes in its starry sky doorways to other universes, and he felt that there were invisible beings around him, impalpable thinking mists that lived in the cold intergalactic depths of space, and this engendered in him a sudden fear sharper than had the planet's defensive skin.

It was perhaps this sharper fear that launched his winging vision on its second exploration of the Wanderer. He no longer stuck to corridors, but flashed without flinching through wall after wall, aware of the thickest of them only as a fleeting blink in his seeing as he sped through room after room. And now when he paused, it was always near living beings. These living beings were not of one sort, but many.

Although felinoids or cat-people like his conductor formed a large minority of the Wanderer's crew, especially near the planet's surface, there were beings that seemed an end product of almost every line of terrestrial evolution, and unearthly lines, too: great-headed horses with organs of manipulation nesting in their hooves; giant, tranquil-eyed spiders pulsing at their joints with a strongly pumped arterial blood-flow; serpents with large and small grasping tentacles; glintingly scaled and gorgeously crested humanoid lizards; beings shaped and moving like thick wheels with a counter-rotating central brain and sensorium; land-dwelling squid that stood proudly on three or six tentacles; and beings seemingly inspired by such creatures of myth as the basilisk and the harpy. These last Don found deep in the planet, winging about in a room like a gigantic aviary. This room, so big that it occupied many floors  -  an interior world  -  was grown over with slim, multibranching trees with tiny leaves, and lighted by a dozen great floating lamps like suns.

Some of the turquoise lakes he had glimpsed from the Baba Yaga were as deep as they were wide, and in them dwelt great-eyed and presumably vast-brained whales with arms like cables fingered at the ends with filaments. And beside the whales swam other seemingly intelligent, mobile-visaged sea beings.

Don wanted to stop and study all of these beings, observe their actions in detail, but always the urge to see some yet more mysterious or wonderful life form was greater, with the result that his pauses were hardly longer than when he had been hurtling along the empty avenues. In no case did the beings he observed appear to be aware of his presence.

None of the life forms seemed to keep racial privacy: there had been a few cat-people engaged in apparently amicable converse with the smaller harpies in their aviary-world, and there had been giant spiders arm-oaring in translucent diving suits through one of the deep lakes of the whales.

It began to seem incredible to him that the variety and numbers of the beings he was spying on could be held by an Earth-size planet, but then it occurred to him that with her decks the Wanderer had about 15,000 times the surface area of Earth.

Despite their numbers and variety, most of the beings he watched so briefly appeared to be urgently busy. Even the motionless ones seemed to be rapt in work  -  crucial cogitations. There was an omnipresent sense of crisis.

Occasionally, as if by a failure of flight pattern, or perhaps for relief, Don would pause in a room without living occupants: great tanks filling up with moon rock; halls of silent glowing machinery and pipes coursing with fluids of many colors; rooms of strange vegetation sunlit by lamps  -  only these might be intelligent plants; rooms of smoothly geometric structures that seemed on the verge of life, like those on the Wanderer's surface; spherical rooms filled with pure, raw, fiery sun-stuff, although it neither burned nor blinded him.

Occasionally he saw physical work being done by artificial-seeming protoplasmic beings like giant amoebas whose manipulatory columns and sense organs varied with the task being performed. Elsewhere there labored metal robots counterfeiting spiders, wheel-beings, and many other life forms  -  though some of these robots seemed truly alive, as did certain large structures like gigantic electronic brains. Their transparent walls showed dark jellies glinting with tangled silvery lines finer than hairs, as if they grew nerves and thought-cells as needed.

The greater the variety of intelligent life Don saw, the more he became sensitive to its presence. Now, when he paused in the star-specked central globe, it seemed to swim with faint violet mist-beings of everchanging shape and multi-armed: cold creatures of the darkness beyond the stars. And once when he soared briefly to the upper deck, he glimpsed one of the great colored abstract forms split like an egg and spill out a horde of beings.

Yet the more sensitive he became to the presence of intelligent life, the more he was racked by the conviction that there were all around him invisible forms of it beyond his sensing  -  as if the Wanderer had more ghosts aboard than all her crew members.

He paused in a profoundly still room of many balconies and almost an infinitude of cases of tiny drawers, like the card catalogue room of a library. Filament-like tracks led from the drawers to viewing instruments suggesting great microscopes, and it seemed to Don that there was travel along the multiplicity of cobwebs, and he had the thought that here servile microbes and viruses were sorting and ordering for inspection molecules on which were etched the total knowledge of races and the histories of worlds. All Earth's thought and culture, he told himself, would easily fit into just one of the tiny drawers. It was almost as if he brushed here the universal, all-encompassing viewpoint of eternity which is sometimes called God.

From that room he flashed into a busier one crowded with command tables, maps, charts, screens and tanks for three-dimensional viewing. On and in the latter were ever-changing scenes of catastrophe: landscapes and cities riven by earthquake, seared by fire, inundated by great waves and silent rises of water. He peered excitedly for a while, then it came to him with horror that this was his own planet Earth suffering tidal mutilation in the grip of the Wanderer's mass  -  the Wanderer, which could turn gravity on and off as suited its purposes.

He wanted to stay and watch, or thought he did, but instead he was irresistibly hurried off through several walls into a chamber that was one great dark viewing tank with alien faces all around it, some with two eyes, some with three and some with eight. In the tank hung models of Earth and the Wanderer and a looping, swelling quarter-ring that was the remnants of Luna. Here and there, mostly clustering close to the two planets, were points of violet and yellow light which he guessed were spaceships.

The larger globes were the right distance apart  -  some thirty times their diameter  -  and Don could not tell whether they were replicas or three-dimensional projections. The illusion was so good that he felt he was drifting in space, with the weird alien faces replacing the constellations.

Then without warning other planets, green, gray, gold, some as strangely figured as the Wanderer, began to appear by ones and twos. Bright bolts of light that traveled with a curious slowness shot between them  -  radiation moving 186,000 miles a second, but slowed down to scale. There were miniscule explosions. Light-point spaceships moved in warring fleets. Then all the planets but Earth began to move about swiftly as if maneuvering in a battle.

But he never saw the outcome of the engagement, for the forces moving him through, the Wanderer began to work on him with greater urgency, as if he were nearing the end of his trip. For the first time he felt a pang of weariness.

The next three rooms he was hurried through were all viewing tanks with backgrounds velvet black except for the alien faces of the viewers. The first showed a swirled lens of bright points and clusters of light  -  a galaxy, certainly, probably the Milky Way.

The second room held a great swarm of tiny, soft, spherical and disk-shaped puffs of light spaced rather more than their own diameters apart There was something strange about the space in this tank  -  it seemed to curve back upon itself mysteriously, so that as he moved about everything changed more than it ought. Just before he was whirled on, Don guessed he was seeing the entire cosmos of star-islands: the totality, the universe.

His imagination began to wander sleepily, independently of his viewing. Phrases drifted through his mind: This artificial planet...the umbilicus of the cosmos...the central brain...the eternal eye...the book of the past...the womb and zygote of the future...transcendent as God, yet not God...

He returned to himself, or to his winging viewpoint, with a start, to realize that he was gazing into a great black viewing tank in which the cosmos he had just seen  -  it was recognizable by its mysteriously twisted shape  -  was only one small, pale puff of light floating alone. Then ghostlier light-puffs of other shapes and hues began to appear and vanish, some swiftly as a firefly's flash, some lingering a while. Don wondered dreamily if these were other universes known to the beings of the Wanderer. Or perhaps only universes guessed at...sought...there was something hypothetical about their ghostliness and their swift vanishing...and stars and galaxies and universes are truly such unreal things, no more than the dim points of light that swim before one's eyes before one sleeps...

Then the one bright cosmos began to dip and dart about like a leaf in a whirlwind, and he worried dreamily why that should be, since surely the universe is firm-based...and then the ghost cosmoses began to swirl too, hypothetically...

The last room Don traversed shocked him briefly awake as no other sight might have, and there seemed to be a moral to it, though his weary mind was unable to put it into words. It was a huge, worldlike room, similar to that of the harpies, with a furnace-red sky arching above a veldt dotted with rocks and tree clumps. Small hoofed animals more delicate than deer and armed with a single slim horn grazed fastidiously. Birds with ruby and topaz and emerald plumage and with elaborate combs and wattles flew low, frequently settling into the tall grass and the tree clumps as if in search of seeds and fruit.

Suddenly three birds whirred up at once from the grass, and the nearest group of unicorns held tremblingly still, sniffing the air and peering about fearfully, then took off with great bounds. Simultaneously there sprang from behind a rock a gray-barred tan felinoid otherwise resembling Don's conductor. He raced after the unicorns, his long legs flashing, hurled himself on the last, brought it crashing down from mid-bound, grasped it by chest and chin, and dipped his jaws toward its throat.

A topaz bird winged past the nearest tree-clump and from it there sprang a green-furred felinoid, female by her smaller size and slightly different contours. She leaped with the soaring grace and almost incredible elevation of a ballet dancer executing a grand jet��. Her long arm flashed and barely brushed the bird, but three long talons deeply pricked its breast. Grasping it by the comb with her other hand, she carried it to her lips and bit expertly into its ruffling neck.

There was a redness on her dull olive lips and on the one long white fang showing as she looked across the yellow feathers straight at Don with her large and flowerlike, jade-irised eyes. It may have been coincidence, but he felt that she saw him. And as she sucked the blood, with the blood-red sky behind her, she smiled.

Then a swooning tiredness came, and things grew dim and neutral-hued, and Don realized he was floating once more in his tiny cabin. He tried to look down at the bed, but was again unable to. The next instant he was lying on it. He felt its soothing touch from toe to head as all vision faded and his sense of rocketing, swooping movement gyrated down to darkness and to rest.