Nat-ul grasped her knife more firmly. The sounds ceased upon the ledge directly beneath her. Then, after a few moments they were resumed, but to the girl's relief they now retreated down the steep bluff. Presently they ceased entirely, and though it was hours before she could quiet her fears she at last fell into a deep slumber.
At dawn Nu, the son of Nu, awoke. He rose and stretched himself, standing in the glare of the new sun upon the ledge before his cave. Fifty feet above him slept the girl he loved. Nu gathered up his weapons and his bear skin, and moved silently down to the spring where he quenched his thirst. Then he passed through the jungle to the sea. Here he removed his loincloth and the skin that covered his shoulders and waded into the surf. In his right hand he held his knife, for great reptiles inhabited the Restless Sea. Carefully he bathed, keeping a wary watch for enemies in the water or upon the land behind. In him was no fear, for he knew no other existence than that which might present at any moment the necessity of battling for his life with some slimy creature of the deep, or equally ferocious denizen of the jungle or the hills. To Nu it was but a part of the day's work. You or I might survive a single day were we suddenly cast back into the primeval savagery of Nu's long dead age, and Nu, if as suddenly transplanted to the corner of Fifth Avenue and Twenty-third Street might escape destruction for a few hours, but sooner or later a trolley car or a taxi would pounce upon him.
His ablutions completed, the troglodyte replaced his loin cloth and his shaggy fur, took up his weapons and his burden and set forth upon the trail of his father's people. And above him, as he passed again along the foot of the cliff, the woman that he loved slept in ignorance of his presence.
When, at last, Nat-ul awoke the sun was high in the heavens. The girl came cautiously down the cliff face, looking first in one direction and then another, often pausing for several minutes at a time to listen. All about her were the noises of the jungle and the sea and the air, for great birds and horrid winged reptiles threatened primeval men as sorely from above as did the carnivora of the land from his own plane.
She came to the spring in safety, and passed on into the jungle in search of food, for she was half-famished. Fruits and vegetables, with grasshoppers, caterpillars and small rodents, and the eggs of birds and reptiles were what she sought, nor was she long in satisfying the cravings of her appetite. Nature was infinitely more bountiful in those days than at the present, for she had infinitely more numerous and often far greater stomachs to satisfy then than now.
Nat-ul passed through the jungle to the beach. She had wanted to bathe, but, alone, she dared not. Now she stood wondering in which direction the tribe had gone. She knew that ordinarily if they had been traveling either north or south they would follow the hard-packed sand of the beach, for there the traveling was easiest, but the tide would have washed away their spoor long before this. She had seen signs of their passage north beside the jungle, but the trail was an old, well worn one traversed daily by many feet, so she had not been able to guess from it that it contained the guide to the direction her people had taken.
As she stood upon the beach trying to reason out her future plans, it became apparent that if the tribe had gone north she would have met them on her return from the Barren Cliffs yesterday, and so, as she had not met them, they must have gone south.
And so she turned her own footsteps south away from her people and from Nu.
IV