As Nat-ul witnessed his act she redoubled her efforts to retard Tur. Crawling to her knees she threw both arms about her captor's neck, dragging him down until he could no longer wield his paddle. Tur fought to disengage himself. He did not wish to kill or maim his captive—she was far too beautiful to destroy or disfigure—he wanted her in all her physical perfection, just as she was.
Gradually Nu was overhauling them. Twice he was attacked by slimy monsters. Once he fought his way to victory, and again the two who menaced him fell to fighting between themselves and forgot their prey. At last he was within reach of Tur's boat. Nat-ul battling with desperation and every ounce of her strength to hamper Tur's movements was tugging at the man's arms. He could do nothing, and already Nu had seized the side of the craft and was raising one leg over it.
With a sudden wrench Tur freed his right hand. Nat-ul strove to regain it, but the great fist rose above her face. With terrific impact it fell upon her forehead. All went black before her as she released her hold upon Tur and sank to the bottom of the boat, unconscious.
Instantly Tur snatched up his paddle and leaping to his feet beat furiously at Nu's head and hands. Bravely the man strove to force his way into the boat in the face of this terrific punishment; but it was too severe, and at last, half stunned, he slipped back into the water, as Tur drove his paddle once again and the rude craft forged away toward the mainland.
When Nat-ul regained consciousness she found herself lying upon a shaggy aurochs skin beneath a rude shelter of thatch and hide. Her hands and feet were securely bound with tough bullock sinew. When she struggled to free herself they cut into her soft flesh, hurting cruelly. So she lay still looking straight up at the funnel-like peak of the shelter's interior.
She knew where she was. This was one of the strange caves of the people she had seen working upon the tree trunks, for what purpose she now knew. She turned her head toward the entrance. Beyond she saw men and women squatting about small fires, eating. It was already dark. Beyond them were other fires, larger fires that kept the savage carnivora at bay.
And beyond this outer circle of fires, from out of the outer darkness, came the roaring and the coughing, the grunting and the growling of scores of terrible beasts of prey, that slunk back and forth about the encampment thirsting for the blood of the men and women and children who huddled within the safety of the protecting fires.
Occasionally a little boy would snatch up a burning brand and hurl it among the night prowlers. There would be a chorus of angry screams and low toned, rumbling growls as the menacers retreated for an instant, then the ring of shadowy forms, and the glowing spots of burning flame that were their eyes, would reform out of the stygian blackness of the night.
Once a cave-lion, emboldened by familiarity with the camp fires of primitive people, leaped through the encircling ring of flame. Into the midst of a family party he sprang, seizing upon an old man. Instantly a half hundred warriors snatched up their spears, and as the lion turned with his prey and leaped back into the night fifty harpoons caught him in mid-air.