There the tiny spider, youngest of hatchlings, barely four inches across, stealthily stalked some other still tinier mite, the little, many-legged larva of the oil-beetle, known as the bee-louse. The almost infinitely small bee-louse was barely two inches long, and could easily hide in the thick fur of a great bumblebee.

This one small creature would never fulfill its destiny, however. The hatchling spider sprang—it was a combat of midgets which was soon over. When the spider had grown and was feared as a huge, black-bellied tarantula, it would slay monster crickets with the same ease and the same implacable ferocity.

The outcropping of rock looked still and innocent. There was one point where it overhung, forming a shelf, beneath which the stone fell away in a sheer-drop. Many colored fungus growths covered the rock, making it a riot of tints and shades. But hanging from the rooflike projection of the stone there was a strange, drab-white object. It was in the shape of half a globe, perhaps six feet by six feet at its largest. A number of little semicircular doors were fixed about its sides, like inverted arches, each closed by a blank wall. One of them would open, but only one.

The house was like the half of a pallid orange, fastened to the roof of rock. Thick cables stretched in every direction for yards upon yards, anchoring the habitation firmly, but the most striking of the things about the house—still and quiet and innocent, like all the rest of the rock outcropping—were the ghastly trophies fastened to the outer walls and hanging from long silken chains below.

Here was the hind leg of one of the smaller beetles. There was the wing-case of a flying creature. Here a snail-shell, two feet in diameter, hanging at the end of an inch-thick cable. There a boulder that must have weighed thirty or forty pounds, dangling in similar fashion.

But fastened here and there, haphazard and irregularly, were other more repulsive remnants. The shrunken head-armor of a beetle, the fierce jaws of a cricket—the pitiful shreds of a hundred creatures that had formed forgotten meals for the bloated insect within the home.

Comparatively small as was the nest of the clotho spider, it was decorated as no ogre's castle had ever been adorned—legs sucked dry of their contents, corselets of horny armor forever to be unused by any creature, a wing of this insect, the head of that. And dangling by the longest cord of all, with a silken cable wrapped carefully about it to keep the parts together, was the shrunken, shriveled, dried-up body of a long-dead man!

Outside, the nest was a place of gruesome relics. Within, it was a place of luxury and ease. A cushion of softest down filled all the bulging bottom of the hemisphere. A canopy of similarly luxurious texture interposed itself between the rocky roof and the dark, hideous body of the resting spider.

The eyes of the hairy creature glittered like diamonds, even in the darkness, but the loathsome, attenuated legs were tucked under the round-bellied body, and the spider was at rest. It had fed.

It waited, motionless, without desires or aversions, without emotions or perplexities, in comfortable, placid, machinelike contentment until time should bring the call to feed again.

A fresh carcass had been added to the decorations of the nest only the night before. For many days the spider would repose in motionless splendor within the silken castle. When hunger came again, a nocturnal foray, a creature would be pounced upon and slain, brought bodily to the nest, and feasted upon, its body festooned upon the exterior, and another half-sleeping, half-waking period of dreamful idleness within the sybaritic charnel-house would ensue.

Slowly and timidly, half a dozen pink-skinned creatures made their way through the mushroom forest that led to the outcropping of rock under which the clotho spider's nest was slung. They were men, degraded remnants of the once dominant race.

Burl was their leader, and was distinguished solely by two three-foot stumps of the feathery, golden antennæ of a night-flying moth he had bound to his forehead. In his hand was a horny, chitinous spear, taken from the body of an unknown flying creature killed by the flames of the burning purple hills.

Since Burl's return from his solitary—and involuntary—journey, he had been greatly revered by his tribe. Hitherto it had been but a leaderless, formless group of people, creeping to the same hiding-place at nightfall to share in the food of the fortunate, and shudder at the fate of those who might not appear.

Now Burl had walked boldly to them, bearing, upon his back the gray bulk of a labyrinth spider he had slain with his own hands, and clad in wonderful garments of a gorgeousness they envied and admired. They hung upon his words as he struggled to tell them of his adventures, and slowly and dimly they began to look to him for leadership. He was wonderful. For days they had listened breathlessly to the tale of his adventures, but when he demanded that they follow him in another and more perilous affair, they were appalled.

A peculiar strength of will had come to Burl. He had seen and done things that no man in the memory of his tribe had seen or done. He had stood by when the purple hills burned and formed a funeral pyre for the horde of army ants, and for uncounted thousands of flying creatures. He had caught a leaping tarantula upon the point of his spear, and had escaped from the web of a banded web-spider by oiling his body so that the sticky threads of the snare refused to hold him fast. He had attacked and killed a great gray labyrinth spider.

But most potent of all, he had returned and had been welcomed by Saya—Saya of the swift feet and slender limbs, whose smile roused strange emotions in Burl's breast.

It was the adoring gaze of Saya that had roused Burl to this last pitch of rashness. Months before the clotho spider in the hemispherical silk castle of the gruesome decorations had killed and eaten one of the men of the tribe. Burl and the spider's victim had been together when the spider appeared, and the first faint gray light of morning barely silhouetted the shaggy, horrible creature as it leaped from ambush behind a toadstool toward the fear-stricken pair.

Its attenuated legs were outstretched, its mandibles gaped wide, and its jaws clashed horribly as it formed a black blotch in mid air against the lightening sky.

Burl had fled, screaming, when the other man was seized. Now, however, he was leading half a dozen trembling men toward the inverted dome in which the spider dozed. Two or three of them bore spears like Burl himself, but they bore them awkwardly and timorously. Burl himself was possessed by a strange, fictitious courage. It was the utter recklessness of youth, coupled with the eternal masculine desire to display prowess before a desired female.

The wavering advance came to a halt. Most of the naked men stopped from fear, but Burl stopped to invoke his newly discovered inner self, that had furnished him with such marvelous plans. Quite accidentally he had found that if he persistently asked himself a question, some sort of answer came from within.

Now he gazed up from a safe distance and asked himself how he and the others were to slay the clotho spider. The nest was some forty feet from the ground, on the undersurface of a shelf of rock. There was sheer open space beneath it, but it was firmly held to its support by long, silken cables that curled to the upper side of the rock-shelf, clinging to the stone.

Burl gazed, and presently an idea came to him. He beckoned to the others to follow him, and they did so, their knees knocking together from their fright. At the slightest alarm they would flee, screaming in fear, but Burl did not plan that there should be any alarm.

He led them to the rear of the singular rock formation, up the gently sloping side, and toward the precipitous edge. He drew near the point where the rock fell away. A long, tentacle-like