Their diversity itself was uncanny, that was certain. In all Dworn's experience, machines were the work of races whose traditions of construction, handed down from forgotten antiquity, were as fixed and unvarying as the biological heredity that made one race light-haired, another dark.... A hatch-cover clanged shut, and another. The squabbling scavengers had finally noticed the appearance of outside competition. The one upslope raced its engine uncertainly, swung round to face the buzzing invaders, hesitated. The newcomers, for their part, seemed oblivious to the scavengers' presence. Their column began dispersing. A grapple-armed machine laid hold on one of the wrecked beetles and, whining with effort, sought to drag it to leveler ground. A second, following, spat a burst of sparks and extended a gleaming arm tipped by the singing blue radiance of a cutting torch. The first-come scavenger growled throatily and lumbered toward the interlopers, plainly taking heart from their air of harmless stupidity. Behind it, the other scavenger came clattering up the slope to its fellow's aid. Flame bloomed thunderously from the muzzle of the first one's forward gun. The machine with the torch was flung bodily into the air and went rolling and bouncing down the hill, wheels futilely spinning. The gun roared again, and the exploding shell tore open a flimsy aluminum body from nose to tail. Motors whirred frantically as the pygmies scattered before the charging behemoth. One of them darted witlessly right under the huge treads, and disappeared with a brief screech of crumpling metal. * * * * * The fight was over as quickly as it had begun. The scavenger wheeled, snorting, and fired one more shot into the dark after its routed opponents.... Dworn muttered an imprecation under his breath. No chance of frightening the scavengers off now that their blood was up and their differences forgotten; and a lone beetle could scarcely stand up to two of them in a knock down fight. To rush in now would be suicidal. He gave up the idea of investigating the scene of disaster more closely, and backed stealthily away, keeping to the cover of the rocks. At a safe distance he began circling round, downslope. What he could and must do now was to locate what was left of his native horde. It had numbered about fifty when he had departed for his wanderyear; a dozen, perhaps more, had died on the mountain tonight. He must seek out the survivors, and help plan retaliation against whatever enemy had dealt them this terrible blow. Yet something else nagged at his mind, until he halted to gaze achingly once more toward the glowing embers up there, where the scavengers now clanked to and fro about their business.