Near sunset of this particular day, Tharn awoke from a nap, as it was his practice during the baking heat of mid-afternoons. By thus conserving his strength during the more trying portion of the days, he was able to spend many hours after nightfall, when the air was cooler, in pursuit of his quarry.
Rising to his feet on a softly swaying branch a full hundred feet above the jungle floor, Tharn flexed the mighty muscles of arms and legs, his naked chest swelling as he drew in great draughts of humid atmosphere. The slender fingers of his strong, sun-bronzed hand pushed back the shock of thick black hair crowning his finely shaped head and strikingly handsome features, while the flashing, intelligent gray eyes roved quickly over the mazes of foliage surrounding him.
Nor was it his eyes alone that probed those curtains of growing things; ears and a nose keen as those of any jungle dweller were no less active.
He was on the point of descending to the game trail below when Siha, the wind, brought to his sensitive nostrils the scent of man commingled with the acrid smell of Sadu, the lion.
For the space of a dozen heartbeats he stood there, high above the hard-packed earth, while his keen mind rapidly analyzed the message his nose had picked up. From the strength of those scents he knew both man and beast were not far away, while the direction of the breeze told him their position.
Since the day Tharn, the son of Tharn, set out in search of the girl he loved, he had encountered men on several occasions and always those meetings were unpleasant. The Cro-Magnon tribes inhabiting the mountain ranges between Sephar and the land of Ammad were distinguished by their ability as fighters and an unflagging suspicion of strangers. Were it not for Tharn's tremendous strength and incredible agility, he would have died long ere this.
Consequently his first reaction was to let Sadu and the unknown man settle their impending quarrel without his own intervention. But a basic part of Tharn's character was his ready willingness to come to the aid of the underdog, to champion the cause of the weak and oppressed. It was a trait which had brought him to the brink of disaster more than once; but Tharn, were he to have given the matter any thought at all, would not have had it otherwise.
Thus it was that the caveman altered his course to the east and he set off through the trees, swinging among the branches with the ease and celerity of little Nobar, the monkey. Now and then, with the agility of long practice, he sent his lithe body hurtling across some gap between trees, to grasp with unerring accuracy the limb his quick eye had selected. Yet notwithstanding his seemingly reckless pace his passage was almost soundless; and though the tangled verdure appeared as a solid wall, only rarely did his flying figure scrape against the riot of vegetation hemming him in.
A few minutes later the giant Cro-Magnard swung into the branches of a tree at the edge of a large circular clearing. Even as he reached the broad surface of a bough extending over the floor of the open ground, he caught sight of his old enemy, Sadu, the lion, crouching in the trail almost directly beneath him. Simultaneously he saw Sadu's intended prey: a slender Cro-Magnon youth, some four years younger than Tharn himself, who was standing stiffly erect, facing the lion, a flint-tipped spear poised in his right hand.
Tharn felt himself thrill to the boy's unflinching courage even as he recognized its futility, since no human could thus withstand the iron-thewed engine of destruction that was Sadu, the lion.