Over time-ruined Illar the searching planes swooped and circled. Northwest Smith, peering up at them with a steel-pale stare from the shelter of a half-collapsed temple, thought of vultures wheeling above carrion. All day long now they had been raking these ruins for him. Presently, he knew, thirst would begin to parch his throat and hunger to gnaw at him. There was neither food nor water in these ancient Martian ruins, and he knew that it could be only a matter of time before the urgencies of his own body would drive him out to signal those wheeling Patrol ships and trade his hard-won liberty for food and drink. He crouched lower under the shadow of the temple arch and cursed the accuracy of the Patrol gunner whose flame-blast had caught his dodging ship just at the edge of Illar’s ruins.

Presently it occurred to him that in most Martian temples of the ancient days an ornamental well had stood in the outer court for the benefit of wayfarers. Of course all water in it would be a million years dry now, but for lack of anything better to do he rose from his seat at the edge of the collapsed central dome and made his cautious way by still intact corridors toward the front of the temple. He paused in a tangle of wreckage at the courtyard’s edge and looked out across the sun-drenched expanse of pavement toward that ornate well that once had served travelers who passed by here in the days when Mars was a green planet.

It was an unusually elaborate well, and amazingly well preserved. Its rim had been inlaid with a mosaic pattern whose symbolism must once have borne deep meaning, and above it in a great fan of time-defying bronze an elaborate grille-work portrayed the inevitable tree-of-life pattern which so often appears in the symbolism of the three worlds. Smith looked at it a bit incredulously from his shelter, it was so miraculously preserved amidst all this chaos of broken stone, casting a delicate tracery of shadow on the sunny pavement as perfectly as it must have done a million years ago when dusty travelers paused here to drink. He could picture them filing in at noontime through the great gates that----

The vision vanished abruptly as his questing eyes made the circle of the ruined walls. There had been no gate. He could not find a trace of it anywhere around the outer wall of the court. The only entrance here, as nearly as he could tell from the foundations that remained, had been the door in whose ruins he now stood. Queer. This must have been a private court, then, its great grille-crowned well reserved for the use of the priests. Or wait--had there not been a priest-king Illar after whom the city was named? A wizard-king, so legend said, who ruled temple as well as palace with an iron hand. This elaborately patterned well, of material royal enough to withstand the weight of ages, might well have been sacrosanct for the use of that long-dead monarch. It might----

Across the sun-bright pavement swept the shadow of a plane. Smith dodged back into deeper hiding while the ship circled low over the courtyard. And it was then, as he crouched against a crumbled wall and waited, motionless, for the danger to pass, that he became aware for the first time of a sound that startled him so he could scarcely credit his ears--a recurrent sound, choked and sorrowful--the sound of a woman sobbing.

The incongruity of it made him forgetful for a moment of the peril hovering overhead in the sun-hot outdoors. The dimness of the temple ruins became a living and vital place for that moment, throbbing with the sound of tears. He looked about half in incredulity, wondering if hunger and thirst were playing tricks on him already, or if these broken halls might be haunted by a million-years-old sorrow that wept along the corridors to drive its hearers mad. There were tales of such haunters in some of Mars’ older ruins. The hair prickled faintly at the back of his neck as he laid a hand on the butt of his force-gun and commenced a cautious prowl toward the source of the muffled noise.

Presently he caught a flash of white, luminous in the gloom of these ruined walls, and went forward with soundless steps, eyes narrowed in the effort to make out what manner of creature this might be that wept alone in time-forgotten ruins. It was a woman. Or it had the dim outlines of a woman, huddled against an angle of fallen walls and veiled in a fabulous shower of long dark hair. But there was something uncannily odd about her. He could not focus his pale stare upon her outlines. She was scarcely more than a luminous blot of whiteness in the gloom, shimmering with a look of unreality which the sound of her sobs denied.

Before he could make up his mind just what to do, something must have warned the weeping girl that she was no longer alone, for the sound of her tears checked suddenly and she lifted her head, turning to him a face no more distinguishable than her body’s outlines. He made no effort to resolve the blurred features into visibility, for out of that luminous mask burned two eyes that caught his with an almost perceptible impact and gripped them in a stare from which he could not have turned if he would.

They were the most amazing eyes he had ever met, colored like moonstone, milkily translucent, so that they looked almost blind. And that magnetic stare held him motionless. In the instant that she gripped him with that fixed, moonstone look he felt oddly as if a tangible bond were taut between them.

Then she spoke, and he wondered if his mind, after all, had begun to give way in the haunted loneliness of dead Illar; for though the words she spoke fell upon his ears in a gibberish of meaningless sounds, yet in his brain a message formed with a clarity that far transcended the halting communication of words. And her milkily colored eyes bored into his with a fierce intensity.

“I’m lost--I’m lost----” wailed the voice in his brain.

A rush of sudden tears brimmed the compelling eyes, veiling their brilliance. And he was free again with that clouding of the moonstone surfaces. Her voice wailed, but the words were meaningless and no knowledge formed in his brain to match them. Stiffly he stepped back a pace and looked down at her, a feeling of helpless incredulity rising within him. For he still could not focus directly upon the shining whiteness of her, and nothing save those moonstone eyes were clear to him.

The girl sprang to her feet and rose on tiptoe, gripping his shoulders with urgent hands. Again the blind intensity of her eyes took hold of his, with a force almost as tangible as the clutch of her hands; again that stream of intelligence poured into his brain, strongly, pleadingly.

“Please, please take me back! I’m so frightened--I can’t find my way--oh, please!”

He blinked down at her, his dazed mind gradually realizing the basic facts of what was happening. Obviously her milky, unseeing eyes held a magnetic power that carried her thoughts to him without the need of a common speech. And they were the eyes of a powerful mind, the outlets from which a stream of fierce energy poured into his brain. Yet the words they conveyed were the words of a terrified and helpless girl. A strong sense of wariness was rising in him as he considered the incongruity of speech and power, both of which were beating upon him more urgently with every breath. The mind of a forceful and strong-willed woman, carrying the sobs of a frightened girl. There was no sincerity in it.

“Please, please!” cried her impatience in his brain. “Help me! Guide me back!”

“Back where?” he heard his own voice asking.

“The Tree!” wailed that queer speech in his brain, while gibberish was all his ears heard and the moonstone stare transfixed him strongly. “The Tree of Life! Oh, take me back to the shadow of the Tree!”

A vision of the grille-ornamented well leaped into his memory. It was the only tree symbol he could think of just then. But what possible connection could there be between the well and the lost girl--if she was lost? Another wail in that unknown tongue, another anguished shake of his shoulders, brought a sudden resolution into his groping mind. There could be no harm in leading her back to the well, to whose grille she must surely be referring. And strong curiosity was growing in his mind. Much more than met the eye was concealed in this queer incident. And a wild guess had flashed through his mind that perhaps she might have come from some subterranean world into which the well descended. It would explain her luminous pallor, if not her blurriness; and, too, her eyes did not seem to function in the light. There was a much more incredible explanation of her presence, but he was not to know it for a few minutes yet.

“Come along,” he said, taking the clutching hands gently from his shoulders. “I’ll lead you to the well.”

She sighed in a deep gust of relief and dropped her compelling eyes from his, murmuring in that strange, gabbling tongue what must have been thanks. He took her by the hand and turned toward the ruined archway of the door.

Against his fingers her flesh was cool and firm. To the touch she was tangible, but even thus near, his eyes refused to focus upon the cloudy opacity of her body, the dark blur of her streaming hair. Nothing but those burning, blinded eyes were strong enough to pierce the veil that parted them.

She stumbled along at his side over the rough floor of the temple, saying nothing more, panting with eagerness to return to her incomprehensible “tree.” How much of that eagerness was assumed Smith still could not be quite sure. When they reached the door he halted her for a moment, scanning the sky for danger. Apparently the ships had finished with this quarter of the city, for he could see two or three of them half a mile away, hovering low over Illar’s northern section. He could risk it without much peril. He led the girl cautiously out into the sun-hot court.

She could not have known by sight that they neared the well, but when they were within twenty paces of it she flung up her blurred head suddenly and tugged at his hand. It was she who led him that last stretch which parted the two from the well. In the sun the shadow tracery of the grille’s symbolic pattern lay vividly outlined on the ground. The girl gave a little gasp of delight. She dropped his hand and ran forward three short steps, and plunged into the very center of that shadowy pattern on the ground. And what happened then was too incredible to believe.

The pattern ran over her like a garment, curving to the curve of her body in the way all shadows do. But as she stood there striped and laced with the darkness of it, there came a queer shifting in the lines of black tracery, a subtle, inexplicable movement to one side. And with that motion she vanished. It was exactly as if that shifting had moved her out of one world into another. Stupidly Smith stared at the spot from which she had disappeared.

Then several things happened almost simultaneously. The zoom of a plane broke suddenly into the quiet, a black shadow dipped low over the rooftops, and Smith, too late, realized that he stood defenseless in full view of the searching ships. There was only one way out, and that was too fantastic to put faith in, but he had no time to hesitate. With one leap he plunged full into the midst of the shadow of the tree of life.

Its tracery flowed round him, molding its pattern to his body. And outside the boundaries everything executed a queer little sidewise dip and slipped in the most extraordinary manner, like an optical illusion, into quite another scene. There was no intervention of blankness. It was as if he looked through the bars of a grille upon a picture which without warning slipped sidewise, while between the bars appeared another scene, a curious, dim landscape, gray as if with the twilight of early evening. The air had an oddly thickened look, through which he saw the quiet trees and the flower-spangled grass of the place with a queer, unreal blending, like the landscape in a tapestry, all its outlines blurred.

In the midst of this tapestried twilight the burning whiteness of the girl he had followed blazed like a flame. She had paused a few steps away and stood waiting, apparently quite sure that he would come after. He grinned a little to himself as he realized it, knowing that curiosity must almost certainly have driven him in her wake even if the necessity for shelter had not compelled his following.

She was clearly visible now, in this thickened dimness--visible, and very lovely, and a little unreal. She shone with a burning clarity, the only vivid thing in the whole twilit world. Eyes upon that blazing whiteness, Smith stepped forward, scarcely realizing that he had moved.

Slowly he crossed the dark grass toward her. That grass was soft under-foot, and thick with small, low-blooming flowers of a shining pallor. Botticelli painted such spangled swards for the feet of his angels. Upon it the girl’s bare feet gleamed whiter than the blossoms. She wore no garment but the royal mantle of her hair, sweeping about her in a cloak of shining darkness that had a queer, unreal tinge of purple in that low light. It brushed her ankles in its fabulous length. From the hood of it she watched Smith coming toward her, a smile on her pale mouth and a light blazing in the deeps of her moonstone eyes. She was not blind now, nor frightened. She stretched out her hand to him confidently.

“It is my turn now to lead you,” she smiled. As before, the words were gibberish, but the penetrating stare of those strange white eyes gave them a meaning in the depths of his brain.

Automatically his hand went out to hers. He was a little dazed, and her eyes were very compelling. Her fingers twined in his and she set off over the flowery grass, pulling him beside her. He did not ask where they were going. Lost in the dreamy spell of the still, gray, enchanted place, he felt no need for words. He was beginning to see more clearly in the odd, blurring twilight that ran the outlines of things together in that queer, tapestried manner. And he puzzled in a futile, muddled way as he went on over what sort of land he had come into. Overhead was darkness, paling into twilight near the ground, so that when he looked up he was staring into bottomless deeps of starless night.

Trees and flowering shrubs and the flower-starred grass stretched emptily about them in the thick, confusing gloom of the place. He could see only a little distance through that dim air. It was as if they walked a strip of tapestried twilight in some unlighted dream. And the girl, with her lovely, luminous body and richly colored robe of hair was like a woman in a tapestry too, unreal and magical.

After a while, when he had become a little adjusted to the queerness of the whole scene, he began to notice furtive movements in the shrubs and trees they passed. Things flickered too swiftly for him to catch their outlines, but from the tail of his eye he was aware of motion, and somehow of eyes that watched. That sensation was a familiar one to him, and he kept an uneasy gaze on those shiftings in the shrubbery as they went on. Presently he caught a watcher in full view between bush and tree, and saw that it was a man, a little, furtive, dark-skinned man who dodged hastily back into cover again before Smith’s eyes could do more than take in the fact of his existence.

After that he knew what to expect and could make them out more easily: little, darting people with big eyes that shone with a queer, sorrowful darkness from their small, frightened faces as they scuttled through the bushes, dodging always just out of plain sight among the leaves. He could hear the soft rustle of their passage, and once or twice when they passed near a clump of shrubbery he thought he caught the echo of little whispering calls, gentle as the rustle of leaves and somehow full of a strange warning note so clear that he caught it even amid the murmur of their speech. Warning calls, and little furtive hiders in the leaves, and a landscape of tapestried blurring carpeted with Botticelli flower-strewn sward. It was all a dream. He felt quite sure of that.

It was a long while before curiosity awakened in him sufficiently to make him break the stillness. But at last he asked dreamily,

“Where are we going?”

The girl seemed to understand that without the necessity of the bond her hypnotic eyes made, for she turned and caught his eyes in a white stare and answered,

“To Thag. Thag desires you.”

“What is Thag?”

In answer to that she launched without preliminary upon a little singsong monolog of explanation whose stereotyped formula made him faintly uneasy with the thought that it must have been made very often to attain the status of a set speech; made to many men, perhaps, whom Thag had desired. And what became of them afterward? he wondered. But the girl was speaking.

“Many ages ago there dwelt in Illar the great King Illar for whom the city was named. He was a magician of mighty power, but not mighty enough to fulfill all his ambitions. So by his arts he called up out of darkness the being known as Thag, and with him struck a bargain. By that bargain Thag was to give of his limitless power, serving Illar all the days of Illar’s life, and in return the king was to create a land for Thag’s dwelling-place and people it with slaves and furnish a priestess to tend Thag’s needs. This is that land. I am that priestess, the latest of a long line of women born to serve Thag. The tree-people are his--his lesser servants.

“I have spoken softly so that the tree-people do not hear, for to them Thag is the center and focus of creation, the end and beginning of all life. But to you I have told the truth.”

“But what does Thag want of me?”

“It is not for Thag’s servants to question Thag.”

“Then what becomes, afterward, of the men Thag desires?” he pursued.

“You must ask Thag that.”

She turned her eyes away as she spoke, snapping the mental bond that had flowed between them with a suddenness that left Smith dizzy. He went on at her side more slowly, pulling back a little on the tug of her fingers. By degrees the sense of dreaminess was fading, and alarm began to stir in the deeps of his mind. After all, there was no reason why he need let this blank-eyed priestess lead him up to the very maw of her god. She had lured him into this land by what he knew now to have been a trick; might she not have worse tricks than that in store for him?

She held him, after all, by nothing stronger than the clasp of her fingers, if he could keep his eyes turned from hers. Therein lay her real power, but he could fight it if he chose. And he began to hear more clearly than ever the queer note of warning in the rustling whispers of the tree-folk who still fluttered in and out of sight among the leaves. The twilight place had taken on menace and evil.

Suddenly he made up his mind. He stopped, breaking the clasp of the girl’s hand.

“I’m not going,” he said.

She swung round in a sweep of richly tinted hair, words jetting from her in a gush of incoherence. But he dared not meet her eyes, and they conveyed no meaning to him. Resolutely he turned away, ignoring her voice, and set out to retrace the way they had come. She called after him once, in a high, clear voice that somehow held a note as warning as that in the rustling voices of the tree-people, but he kept on doggedly, not looking back. She laughed then, sweetly and scornfully, a laugh that echoed uneasily in his mind long after the sound of it had died upon the twilit air.

After a while he glanced back over one shoulder, half expecting to see the luminous dazzle of her body still glowing in the dim glade where he had left her; but the blurred tapestry-landscape was quite empty.

He went on in the midst of a silence so deep it hurt his ears, and in a solitude unhaunted even by the shy presences of the tree-folk. They had vanished with the fire-bright girl, and the whole twilight land was empty save for himself. He plodded on across the dark grass, crushing the upturned flower-faces under his boots and asking himself wearily if he could be mad. There seemed little other explanation for this hushed and tapestried solitude that had swallowed him up. In that thunderous quiet, in that deathly solitude, he went on.

When he had walked for what seemed to him much longer than it should have taken to reach his starting-point, and still no sign of an exit appeared, he began to wonder if there were any way out of the gray land of Thag. For the first time he realized that he had come through no tangible gateway. He had only stepped out of a shadow, and--now that he thought of it--there were no shadows here. The grayness swallowed everything up, leaving the landscape oddly flat, like a badly drawn picture. He looked about helplessly, quite lost now and not sure in what direction he should be facing, for there was nothing here by which to know directions. The trees and shrubs and the starry grass still stretched about him, uncertainly outlined in that changeless dusk. They seemed to go on for ever.

But he plodded ahead, unwilling to stop because of a queer tension in the air, somehow as if all the blurred trees and shrubs were waiting in breathless anticipation, centering upon his stumbling figure. But all trace of animate life had vanished with the disappearance of the priestess’ white-glowing figure. Head down, paying little heed to where he was going, he went on over the flowery sward.

An odd sense of voids about him startled Smith at last out of his lethargic plodding. He lifted his head. He stood just at the edge of a line of trees, dim and indistinct in the unchanging twilight. Beyond them--he came to himself with a jerk and stared incredulously. Beyond them the grass ran down to nothingness, merging by imperceptible degrees into a streaked and arching void--not the sort of emptiness into which a material body could fall, but a solid nothing, curving up toward the dark zenith as the inside of a sphere curves. No physical thing could have entered there. It was too utterly void, an inviolable emptiness which no force could invade.

He stared up along the inward arch of that curving, impassable wall. Here, then, was the edge of the queer land Illar had wrested out of space itself. This arch must be the curving of solid space which had been bent awry to enclose the magical land. There was no escape this way. He could not even bring himself to approach any nearer to that streaked and arching blank. He could not have said why, but it woke in him an inner disquiet so strong that after a moment’s staring he turned his eyes away.

Presently he shrugged and set off along the inside of the line of trees which parted him from the space-wall. Perhaps there might be a break somewhere. It was a forlorn hope, but the best that offered. Wearily he stumbled on over the flowery grass.

How long he had gone on along that almost imperceptibly curving line of border he could not have said, but after a timeless interval of gray solitude he gradually became aware that a tiny rustling and whispering among the leaves had been growing louder by degrees for some time. He looked up. In and out among the trees which bordered that solid wall of nothingness little, indistinguishable figures were flitting. The tree-men had returned. Queerly grateful for their presence, he went on a bit more cheerfully, paying no heed to their timid dartings to and fro, for Smith was wise in the ways of wild life.

Presently, when they saw how little heed he paid them, they began to grow bolder, their whispers louder. And among those rustling voices he thought he was beginning to catch threads of familiarity. Now and again a word reached his ears that he seemed to recognize, lost amidst the gibberish of their speech. He kept his head down and his hands quiet, plodding along with a cunning stillness that began to bear results.

From the corner of his eye he could see that a little dark tree-man had darted out from cover and paused midway between bush and tree to inspect the queer, tall stranger. Nothing happened to this daring venturer, and soon another risked a pause in the open to stare at the quiet walker among the trees. In a little while a small crowd of the tree-people was moving slowly parallel with his course, staring with all the avid curiosity of wild things at Smith’s plodding figure. And among them the rustling whispers grew louder.

Presently the ground dipped down into a little hollow ringed with trees. It was a bit darker here than it had been on the higher level, and as he went down the slope of its side he saw that among the underbrush which filled it were cunningly hidden huts twined together out of the living bushes. Obviously the hollow was a tiny village where the tree-folk dwelt.

He was surer of this when they began to grow bolder as he went down into the dimness of the place. The whispers shrilled a little, and the boldest among his watchers ran almost at his elbow, twittering their queer, broken speech in hushed syllables whose familiarity still bothered him with its haunting echo of words he knew. When he had reached the center of the hollow he became aware that the little folk had spread out in a ring to surround him. Wherever he looked their small, anxious faces and staring eyes confronted him. He grinned to himself and came to a halt, waiting gravely.

None of them seemed quite brave enough to constitute himself spokesman, but among several a hurried whispering broke out in which he caught the words “Thag” and “danger” and “beware.” He recognized the meaning of these words without placing in his mind their origins in some tongue he knew. He knit his sun-bleached brows and concentrated harder, striving to wrest from that curious, murmuring whisper some hint of its original root. He had a smattering of more tongues than he could have counted offhand, and it was hard to place these scattered words among any one speech.

But the word “Thag” had a sound like that of the very ancient dryland tongue, which upon Mars is considered at once the oldest and the most uncouth of all the planet’s languages. And with that clue to guide him he presently began to catch other syllables which were remotely like syllables from the dryland speech. They were almost unrecognizable, far, far more ancient than the very oldest versions of the tongue he had ever heard repeated, almost primitive in their crudity and simplicity. And for a moment the sheerest awe came over him, as he realized the significance of what he listened to.

The dryland race today is a handful of semi-brutes, degenerate from the ages of past time when they were a mighty people at the apex of an almost forgotten glory. That day is millions of years gone now, too far in the past to have record save in the vaguest folklore. Yet here was a people who spoke the rudiments of that race’s tongue as it must have been spoken in the race’s dim beginnings, perhaps a million years earlier even than that immemorial time of their triumph. The reeling of millenniums set Smith’s mind awhirl with the effort at compassing their span.

There was another connotation in the speaking of that tongue by these timid bush-dwellers, too. It must mean that the forgotten wizard king, Illar, had peopled his sinister, twilight land with the ancestors of today’s dryland dwellers. If they shared the same tongue they must share the same lineage. And humanity’s remorseless adaptability had done the rest.

It had been no kinder here than in the outside world, where the ancient plains-men who had roamed Mars’ green prairies had dwindled with their dying plains, degenerating at last into a shrunken, leather-skinned bestiality. For here that same race root had declined into these tiny, slinking creatures with their dusky skins and great, staring eyes and their voices that never rose above a whisper. What tragedies must lie behind that gradual degeneration!

All about him the whispers still ran. He was beginning to suspect that through countless ages of hiding and murmuring those voices must have lost the ability to speak aloud. And he wondered with a little inward chill what terror it was which had transformed a free and fearless people into these tiny wild things whispering in the underbrush.

The little anxious voices had shrilled into vehemence now, all of them chattering together in their queer, soft, rustling whispers. Looking back later upon that timeless space he had passed in the hollow, Smith remembered it as some curious nightmare--dimness and tapestried blurring, and a hush like death over the whole twilight land, and the timid voices whispering, whispering, eloquent with terror and warning.

He groped back among his memories and brought forth a phrase or two remembered from long ago, an archaic rendering of the immemorial tongue they spoke. It was the simplest version he could remember of the complex speech now used, but he knew that to them it must sound fantastically strange. Instinctively he whispered as he spoke it, feeling like an actor in a play as he mouthed the ancient idiom,

“I--I cannot understand. Speak--more slowly----”

A torrent of words greeted this rendering of their tongue. Then there was a great deal of hushing and hissing, and presently two or three between them began laboriously to recite an involved speech, one syllable at a time. Always two or more shared the task. Never in his converse with them did he address anyone directly. Ages of terror had bred all directness out of them.