He had approached to within a hundred yards of the cliffs now, and the scent of Oo had become as a stench in the sensitive nostrils of the cave man. Just ahead he could see the openings to several caves in the face of the rocky barrier, and in one of these he knew must lie the lair of his quarry.

Fifty yards from the cliff the grasses ceased except for scattered tufts that had found foothold among the broken rocks that strewed the ground, and as Nu emerged into this clear space he breathed a sigh of relief for during the past fifty yards a considerable portion of the way had been through a matted jungle that rose above his head. To have met Oo there would have spelled almost certain death for the cave man.

Now, as he bent his eyes toward the nearby cave mouths he discovered one before which was strewn such an array of gigantic bones that he needed no other evidence as to the identity of its occupant. Here, indeed, laired no lesser creature than the awesome Oo, the gigantic, saber-toothed tiger of antiquity. Even as Nu looked there came a low and ominous growl from the dark mouth of the foul cavern, and then in the blackness beyond the entrance Nu saw two flaming blotches of yellow glaring out upon him.

A moment later the mighty beast itself sauntered majestically into the sunlight. There it stood lashing its long tail from side to side, glaring with unblinking eyes straight at the rash man-thing who dared venture thus near its abode of death. The huge body, fully as large as that of a full grown bull, was beautifully marked with black stripes upon a vivid yellow ground, while the belly and breast were of the purest white.

As Nu advanced the great upper lip curled back revealing in all their terrible ferocity the eighteen-inch curved fangs that armed either side of the upper jaw, and from the cavernous throat came a fearsome scream of rage that brought frightened silence upon the jungle for miles around.

The hunter loosened the stone knife at his gee-string and transferred it to his mouth where he held it firmly, ready for instant use, between his strong, white teeth. In his left hand he carried his stone-tipped spear, and in his right the heavy stone hatchet that was so effective both at a distance and at close range.

Oo is creeping upon him now. The grinning jaws drip saliva. The yellow-green eyes gleam bloodthirstily. Can it be possible that this fragile pygmy dreams of meeting in hand-to-hand combat the terror of a world, the scourge of the jungle, the hunter of 

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