.

its towering walls—all this City was one living Thing!

      Built of the animate bodies of countless millions! Tons upon countless tons of them shaping a gigantic pile of which every atom was sentient, mobile —intelligent!

      A Metal Monster!

      Now I knew why it was that its frowning facade had seemed to watch us Argus-eyed as the Things had tossed us toward it. It HAD watched us!

      That flood of watchfulness pulsing about us had been actual concentration of regard of untold billions of tiny eyes of the living block which formed the City's cliff.

      A City that Saw! A City that was Alive!

      No secret mechanism then—back darted my mind to that first terror —had closed the wall, shutting from our sight Norhala at play with the Little Things. None had opened the way for, had closed the way behind, the coursing spheres. It had been done by the conscious action of the conscious Things of whose living bodies was built this whole tremendous thinking pile!

      I think that for a moment we both went a little mad as that staggering truth came to us. I know we started to run once more, side by side, gripping like frightened children each other's hands. Then Drake stopped.

      "By all the HELL of this place," he said, solemnly, "I'll run no more. After all—we're men. If they kill us, they kill us. But by the God who made me I'll run from them no more. I'll die standing."

      His courage steadied me. Defiantly we marched on. Up from below us, down from the roof, out from the walls of our way the hosts of eyes gleamed and twinkled upon us.

      "Who could have believed it?" he muttered, half to himself. "A living city of them! A living nest of them; a prodigious living nest of metal!"

      "A nest?" I caught the word. What did it suggest? That was it—the nest of the army ants, the city of the army ants, that Beebe had studied in the South American jungles and once described to me. After all, was this more wonderful, more unbelievable than that—the city of ants which was formed by their living bodies precisely as this was of the bodies of the Cubes?

      How had Beebe* phrased it—"the home, the nest, the hearth, the nursery, the bridal suite, the kitchen, the bed and board of the army ants." Built of and occupied by those blind and dead and savage little insects which by the guidance of smell alone carried on the most intricate operations, the most complex activities. Nothing here was stranger than that, I reflected —if once one could rid the mind of the paralyzing influence of the shapes of the Metal Things. Whence came the stimuli that moved THEM, the stimuli to which THEY reacted?

      * William Beebe, Atlantic Monthly, October, 1919.

      Well then—whence and how came the orders to which the ANTS responded; that bade them open THIS corridor in their nest, close THAT, form this chamber, fill that one? Was one more mysterious than the other?

      Breaking into my current of thoughts came consciousness that I was moving with increased speed; that my body was fast growing lighter.

      Simultaneously with this recognition I felt myself lifted from the floor of the corridor and levitated with considerable rapidity forward; looking down I saw that floor several feet below me. Drake's arm wound itself around my shoulder.

      "Closing up behind us," he muttered. "They're putting us—out."

      It was, indeed, as though the passageway had wearied of our deliberate progress. Had decided to—give us a lift. Rearward it was shutting. I noted with interest how accurately this motion kept pace with our own speed, and how fluidly the walls seemed to run together.

      Our movement became accelerated. It was as though we floated buoyantly, weightless, upon some swift stream. The sensation was curiously pleasant, languorous—what was that word Ruth had used?—ELEMENTAL —and free. The supporting force seemed to flow equally from walls and floor; to reach down to us from the roof. It was slumberously even, and effortless. I saw that in advance of us the living corridor was opening even as behind us it was closing.

      All around us the little eye points twinkled and—laughed.

      There was no danger here—there could be none. Deeper and deeper dropped my mind into the depths of that alien tranquillity. Faster and faster we floated—onward.

      Abruptly, ahead of us shone a blaze of daylight. We passed into it. The force holding us withdrew its grip; I felt solidity beneath my feet; stood and leaned back against a smooth wall.

      The corridor had ended and—had shut us out from itself.

      "Bounced!" exclaimed Drake.

      And incongruous, flippant, colloquial as was that word, I know none that would better describe my own feelings.

      We were BOUNCED out upon a turret jutting from the barrier. And before us lay spread the most amazing, the most extraordinary fantastic scene upon which, I think, the vision of man has rested since the advent of time.

      XX

      VAMPIRES OF THE SUN

      It was a crater; a half mile on high and all of two thousand feet across ran the circular lip of its vast rim. Above it was a circle of white and glaring sky in whose center flamed the sun.

      And instantly, before my vision could grasp a tithe of that panorama, I knew that this place was the very heart of the City; its vital ganglion; its soul.

      Around the crater lip were poised thousands of concave disks, vernal green, enormous. They were like a border of gigantic, upthrust shields; and within each, emblazoned like a shield's device, was a blinding flower of flame—the reflected, dilated face of the sun. Below this diadem hung, pendent, clusters of other disks, swarmed like the globular hiving of the constellation Hercules' captured stars. And each of these prisoned the image of our sun.

      A hundred feet below us was the crater floor.

      Up from it thrust a mountainous forest of the pallidly radiant cones; bristling; prodigious. Tier upon tier, thicket upon thicket, phalanx upon phalanx they climbed. Up and up, pyramidically, they flung their spiked hosts.

      They drew together two thousand feet above us, clustering close about the foot of a single huge spire which thrust itself skyward above them. The crest of this spire was truncated. From its shorn tip radiated scores of long and slender spokes holding in place a thousand feet wide wheel of wan green disks whose concave surfaces, unlike those smooth ones girding the crater, were curiously faceted.

      This amazing structure rested upon a myriad-footed base of crystal, even as had that other cornute fantasy beside which we had met the great Disk. But it was in size to that as—as Leviathan to a minnow. From it streamed the same baffling suggestion of invincible force transmuted into matter; energy coalesced into the tangible; power made concentrate in the vestments of substance.

      Half-way between crater lip and floor began the hordes of the Metal People.

      In colossal animate chevaux-de-frise of hundred-foot girders they thrust themselves out from the curving walls—walls, I knew, as alive as they!

      From these Brobdignagian beams they swung in ropes and clusters— spheres and cubes studded as thickly with the pyramids as ever Titan's mace with spikes. Group after bizarre group they dropped; pendulous. Coppices of slender columns of thistled globes sprang up to meet the festooned joists.

      Between the girders they draped themselves in long, stellated garlands; grouped themselves in innumerable, kaleidoscopic patterns.

      They clicked into place around the golden turret in which we crouched.

      In fantastic arrases they swayed in front of us—now hiding by, now revealing through their quicksilver interweavings the mounts of the Cones.

      And steadily those flowing in below added to their multitudes; gliding up cable and pillar; building out still further the living girders, stringing themselves upon living festoon and living garland, weaving in among them, changing their shapes,