From the surrounding cliffs and jungle came answering challenges from a hundred savage throats—the rumbling thunder of the cave-bear's growl; the roar of Zor, the lion; the wail of the hyena; the trumpeting of the mammoth; the deep toned bellowing of the bull bos, and from distant swamp and sea came the hissing and whistling of saurians and amphibians.
His victory dance completed, Nu busied himself in the removal of the broken spear from the carcass of his kill. At the same time he removed several strong tendons from Oo's fore arm, with which he roughly spliced the broken haft, for there was never an instant in the danger fraught existence of his kind when it was well to be without the service of a stone-tipped spear.
This precaution taken, the man busied himself with the task of cutting off Oo's head, that he might bear it in triumph to the cave of his love. With stone hatchet and knife he hacked and hewed for the better part of a half hour, until at last he raised the dripping trophy above his head, as, leaping high in air, he screamed once more the gloating challenge of the victor, that all the world might know that there was no greater hunter than Nu, the son of Nu.
Even as the last note of his fierce cry rolled through the heavy, humid, super-heated air of the Niocene there came a sudden hush upon the face of the world. A strange darkness obscured the swollen sun. The ground trembled and shook. Deep rumblings muttered upward from the bowels of the young earth, and answering grumblings thundered down from the firmament above.
The startled troglodyte looked quickly in every direction, searching for the great beast who could thus cause the whole land to tremble and cry out in fear, and the heavens above to moan, and the sun to hide itself in terror.
In every direction he saw frightened beasts and birds and flying reptiles scurrying in panic stricken terror in search of hiding places, and moved by the same primitive instinct the young giant grabbed up his weapons and his trophy, and ran like an antelope for the sheltering darkness of the cave of Oo.
Scarcely had he reached the fancied safety of the interior when the earth's crust crumpled and rocked—there was a sickening sensation of sudden sinking, and amidst the awful roar and thunder of rending rock, the cave mouth closed, and in the impenetrable darkness of his living tomb Nu, the son of Nu, Nu of the Niocene, lost consciousness.
That was a hundred thousand years ago.
II
THE EARTHQUAKE