intense, so intolerably sweet that somehow in its very strength it set free a part of his dazed mind as it passed the limits of audible things and soared into ecstasies which no senses bound. And though it gripped him ever closer in its magic, a sane part of his brain was waking into realization. For the first time alarm came back into his mind, and by slow degrees the world returned about him. He stared stupidly at the grass moving by under his pacing feet. He lifted a dragging head and saw that the trees no longer rose about him, that a twilit clearing stretched away on all sides toward the forest rim which circled it, that the music was singing from some source so near that—that—
The Tree! Terror leaped within him like a wild thing. The Tree, quivering with unbearable clarity in the thick, dim air, writhed above him, blossoms blazing with bloody radiance and every branch vibrant and undulant to the tune of that unholy song. Then he was aware of the lovely, luminous whiteness of the priestess swaying forward under the swaying limbs, her hair rippling back from the loveliness of her as she moved.
Choked and frenzied with unreasoning terror, he mustered every; effort that was In him to turn, to run again like a madman out of that dreadful hollow, to hide himself under the weight of all space from the menace of the Tree. And all the while he fought, all the while panic drummed like mad in his brain, his relentless body plodded on straight toward the hideous loveliness of that siren singer towering above him. From the first he had felt subconsciously that it was Thag who called, and now, in the very center of that ocean of vibrant power, he knew. Gripped in the music’s magic, he went on.
All over the clearing other hypnotized victims were advancing slowly, with mechanical steps and wide, frantic eyes as the tree-folk came helplessly to their god’s calling. He watched a group of little, dusky sacrifices pace step by step nearer to the Tree’s vibrant branches. The priestess came forward to meet them with outstretched arms. He saw her take the foremost gently by the hands. Unbelieving, hypnotized with horrified incredulity, he watched her lead the rigid little creature forward under the fabulous Tree whose limbs yearned downward like hungry snakes, the great flowers glowing with avid color.
He saw the branches twist out and lengthen toward the sacrifice, quivering with eagerness. Then with a tiger’s leap they darted, and the victim was swept out of the priestess’ guiding hands up into the branches that darted round like tangled snakes in a clot that hid him for an instant from view. Smith heard a high, shuddering wail ripple out from that knot of struggling branches, a dreadful cry that held such an infinity of purest horror and understanding that he could not but believe that Thag’s victims in the moment of their doom must learn the secret of his horror. After that one frightful cry came silence. In an instant the limbs fell apart again from emptiness. The little savage had melted like smoke among their writhing, too quickly to have been devoured, more as if he had been snatched into another dimension in the instant the hungry limbs hid him. Flame-tipped, avid, they were dipping now toward another victim as the priestess paced serenely forward.
And still Smith’s rebellious feet were carrying him on, nearer and nearer the writhing peril that towered over his head. The music shrilled like pain. Now he was so close that he could see the hungry flower-mouths in terrible detail as they faced round toward him. The limbs quivered and poised like cobras, reached out with a snakish lengthening, down inexorably toward his shuddering helplessness. The priestess was turning her calm white face toward his.
Those arcs and changing curves of the branches as they neared were sketching lines of pure horror whose meaning he still could not understand, save that they deepened in dreadfulness as he neared. For the last time that urgent wonder burned up in his mind why—why so simple a thing as this fabulous Tree should be infused with an indwelling terror strong enough to send his innermost soul frantic with revulsion. For the last time—because in that trembling instant as he waited for their touch, as the music brimmed up with unbearable, brain-wrenching intensity, in that one last moment before the flower-mouths seized him—he saw. He understood.
With eyes opened at last by the instant’s ultimate horror, he saw the real Thag. Dimly he knew that until now the thing had been so frightful that his eyes had refused to register its existence, his brain to acknowledge the possibility of such dreadfulness. It had literally been too terrible to see, though his instinct knew the presence of infinite horror. But now, In the grip of that mad, hypnotic song, in the instant before unbearable terror enfolded him, his eyes opened to full sight, and he saw.
That Tree was only Thag’s outline, sketched three-dimensionally upon the twilight. Its dreadfully curving branches had been no more than Thag’s barest contours, yet even they had made his very soul sick with intuitive revulsion. But now, seeing the true horror, his mind was too numb to do more than register its presence: Thag, hovering monstrously between earth and heaven, billowing and surging up there in the translucent twilight, tethered to the ground by the Tree’s bending stem and reaching ravenously after the hypnotized fodder that his calling brought helpless into his clutches. One by one he snatched them up, one by one absorbed them into the great, unseeable horror of his being. That, then, was the reason why they vanished so instantaneously, sucked into the concealing folds of a thing too dreadful for normal eyes to see.
The priestess was pacing forward. Above her the branches arched and leaned. Caught in a timeless paralysis of horror, Smith stared upward into the enormous bulk of Thag while the music hummed intolerably in his shrinking brain—Thag, the monstrous thing from darkness, called up by Illar in those long-forgotten times when Mars was a green planet. Foolishly his brain wandered among the ramifications of what had happened so long ago that time itself had forgotten, refusing to recognize the fate that was upon himself. He knew a tingle of respect for the ages-dead wizard who had dared command a being like this to his services—this vast, blind, hovering thing, ravenous for human flesh, indistinguishable even now save in those terrible outlines that sent panic leaping through him with every motion of the Tree’s fearful symmetry.
All this flashed through his dazed mind in the one blinding instant of understanding. Then the priestess’ luminous whiteness swam up before his hypnotized stare. Her hands were upon him, gently guiding his mechanical footsteps, very gently leading him forward into—into—
The writhing branches struck downward, straight for his face. And in one flashing leap the moment’s infinite horror galvanized him out of his paralysis. Why, he could not have said. It is not given to many men to know the ultimate essentials of all horror, concentrated into one fundamental unit. To most men it would have had that same paralyzing effect up to the very instant of destruction. But in Smith there must have been a bed-rock of subtle violence, an unyielding, inflexible vehemence upon which the structure of his whole life was reared. Few men have it. And when that ultimate intensity of terror struck the basic flint of him, reaching down through mind and soul into the deepest depths of his being, it struck a spark from that inflexible barbarian buried at the roots of him which had force enough to shock him out of his stupor.
In the instant of release his hand swept like an unloosed spring, of its own volition, straight for the butt of his power-gun. He was dragging it free as the Tree’s branches snatched him from its priestess’ hands. The fire-colored blossoms burnt his flesh as they closed round him, the hot branches gripping like the touch of ravenous fingers. The whole Tree was hot and throbbing with a dreadful travesty of fleshly life as it whipped him aloft into the hovering bulk of incarnate horror above.
In the instantaneous upward leap of the flower-tipped limbs Smith fought like a demon to free his gun-hand from the gripping coils. For the first time Thag knew rebellion in his very clutches, and the ecstasy of that music which had dinned in Smith’s ears so strongly that by now it seemed almost silence was swooping down a long arc into wrath, and the branches tightened with hot insistency, lifting the rebellious offering into Thag’s monstrous, indescribable bulk.
But even as they rose, Smith was twisting in their clutch to maneuver his hand into a position from which he could blast that undulant tree trunk into nothingness. He knew intuitively the futility of firing up into Thag’s imponderable mass. Thag was not of the world he knew; the flame blast might well be harmless to that mighty hoverer in the twilight. But at the Tree’s root, where Thag’s essential being merged from the imponderable to the material, rooting in earthly soil, he should be vulnerable if he were vulnerable at all. Struggling in the tight,