shaft to the river bank. He pushed the great stone away from the entrance and stepped out into the night. He stood erect, listening and sniffing the air. A scarcely perceptible air current was moving up toward the head of the valley. It bore no suspicion of the scent he had been following. All that this indicated was that his quarry was not directly south of him. The gorilla king might have gone to the east or the west or the north; but the river flowed deep and swift on the east, and only the north and west were left.
Tarzan bent close to the ground. Partly by scent, partly by touch he found the trail leading toward the north; or, more accurately, toward the northeast between the river and the cliffs. He moved off upon it; but the necessity for stopping often to verify the trail delayed him, so that he did not move quite as rapidly as the beast he pursued.
He was delayed again at the crossing of the river, for he passed the place at which the trail turned sharply to the right into the stream. He had to retrace his steps, searching carefully until he found it again. Had the wind been right, had the gorilla been moving directly upwind, Tarzan could have trailed him at a run.
The enforced delays caused no irritation or nervousness such as they would have in an ordinary man, for the patience of the hunting beast is infinite. Tarzan knew that eventually he would overhaul his quarry, and that while they were on the move the girl was comparatively safe.
Dawn broke as he crossed the river. Far ahead he heard the roaring of a hunting lion, and presently with it were mingled the snarls and screams of another beast—a gorilla. And the ape-man knew that Numa had attacked one of the great apes. He guessed that it was the gorilla king. But what of the girl? He heard no human voice mingling its screams with that of the anthropoid. He broke into a run.
Presently, from a little rise of rolling round, he saw Numa crouching upon his kill. It was light enough now for him to see that the lion was feeding upon the body of a gorilla. The girl was nowhere in sight.
Tarzan made a detour to avoid the feeding carnivore. He had no intention of risking an encounter with the king of beasts—an encounter that would certainly delay him and possibly end in death.
He passed at a considerable distance upwind from the lion; and when the beast caught his scent it did not rise from its kill.
Beyond the lion, near the edge of the wood, Tarzan picked up the trail of the girl again. He followed it across the second river. It turned south here, upwind; and now he was below her and could follow her scent spoor easily. At a trot he pressed on.
Now other scent spoor impinged upon his nostrils, mingling with those of the girl. They were strange scents —a mixture of mangani and tarmangani, of great ape and white man, of male and of female.
Tarzan increased his gait. That strange instinct that he shared with the other beasts of the forest warned him that danger lay ahead—danger for the girl and perhaps for himself. He moved swiftly and silently through the fringe of forest that bordered the river.
The strange scents became stronger in his nostrils. A babel of angry voices arose in the distance ahead. He was nearing them. He took to the trees now, to his native element; and he felt at once the sense of security and power that the trees always imparted to him. Here, as nowhere else quite in the same measure, was he indeed lord of the jungle.
Now he heard the angry, raging voice of a female. It was almost human, yet the beast notes predominated; and he could recognize words spoken in the language of the great apes. Tarzan was mystified.
He was almost upon them now, and a moment later he looked down upon a strange scene. There were a score of monstrous creatures—part human, part gorilla. And there was a naked white man just disappearing among the trees with the girl he sought across one shoulder. Pursuing them was a white girl with golden hair streaming behind her. She was as naked as the other beasts gibbering and screaming in her wake.
The man bearing Rhonda Terry ran swiftly, gaining upon the golden haired devil behind him. They both out- stripped the other creatures that had started in pursuit, and presently these desisted and gave up the chase.
Tarzan, swinging through the trees, gained slowly on the strange pair; and so engrossed were they in the business of escape and pursuit that they did not glance up and discover him.
Now the ape-man caught up with the running girl and passed her. Her burst of speed had taken toll of her strength, and she was slowing down. The man had gained on her, too; and now considerable distance separated them.
Through the trees ahead of him Tarzan saw a stretch of open ground, beyond which rose rocky cliffs; then the forest ended. Swinging down to earth, he continued the pursuit; but he had lost a little distance now, and though he started to gain gradually on the fleeing man, he realized that the other would reach the cliffs ahead of him. He could hear the pursuing girl panting a short distance behind him.
Since he had first seen the naked man and woman and the grotesque monsters that they had left behind in the forest, Tarzan had recalled the story that the gorilla god had told him of the mutants that had escaped destruction and formed a tribe upon this side of the valley. These, then, were the terrible fruits of the old biologist's profane experiment— children of the unnatural union of nature and science.
It was only the passing consciousness of a fact to which the ape-man now had no time to give thought. His every faculty was bent upon the effort of the moment—the overtaking of the man who carried Rhonda Terry. Tarzan mar-veiled at the man's speed burdened as he was by the weight of his captive.
The cliffs were only a short distance ahead of him now. At their base were piled a tumbled mass of fragments that had fallen from above during times past. The cliffs themselves presented a series of irregular, broken ledges; and their face was pitted with the mouths of innumerable caves. As the man reached the rubble at the foot of the cliffs, he leaped from rock to rock like a human chamois; and after him came the ape-man, but slower; for he was unaccustomed to such terrain—and behind him, the savage she.
Clambering from ledge to ledge the creature bore Rhonda Terry aloft; and Tarzan followed, and the golden haired girl came after. Far up the cliff face the man pushed Rhonda roughly into a cave mouth and turned to face his pursuer. Tarzan of the Apes turned abruptly to the right then and ran along a narrow ascending ledge with the intention of gaining the ledge upon which the other stood without having to ascend directly into the face of his antagonist. The man guessed his purpose and started along his own ledge to circumvent him. Below them the girl was clambering upward. 'Go back!' shouted the man in the language of the great apes. 'Go back! I kill!'
'Rhonda!' called the ape-man.
The girl crawled from the cave out onto the ledge. ' Stanley!' she cried in astonishment.
'Climb up the cliff,' Tarzan directed. 'You can follow the ledges up. I can keep him occupied until you get to the top. Then go south toward the lower end of the valley.'
'I'll try,' she replied and started to climb from ledge to ledge.
The girl ascending from below saw her and shouted to the man. 'Kreeg-ah!' she screamed. 'The she is escaping!'
Now the man turned away from Tarzan and started in pursuit of Rhonda; and the ape-man, instead of following directly after him, clambered to a higher ledge, moving diagonally in the direction of the American girl.
Rhonda, spurred on by terror, was climbing much more rapidly than she herself could have conceived possible. The narrow ledges, the precarious footing would have appalled her at any other time; but now she ignored all danger and thought only of reaching the summit of the cliff before the strange white man overtook her. And so It was that by a combination of her speed and
Tarzan's strategy the ape-man was able to head off her pursuer before he overtook her.
When the man realized that he had been intercepted he turned upon Tarzan with a savage, snarling growl, his handsome face transformed into that of a wild beast.
The ledge was narrow. It was obvious to Tarzan that the two could not do battle upon it without falling; and while at this point there was another ledge only a few feet below, it could only momentarily stay their descent— while they fought they must roll from ledge to ledge until one or both of them were badly injured or killed.
A quick glance showed him that the wild-girl was ascending toward them. Below and beyond her appeared a number of the grotesque hybrids that had again taken up the chase. Even if the ape-man were the one to survive the duel, all these creatures might easily be upon Mm before it was concluded.
Reason dictated that he should attempt to avoid so useless an encounter in which he would presumably lose his life either in victory or defeat. These observations and deductions registered upon his brain with the speed of a camera shutter flashing one exposure rapidly after another. Then the decision was taken from him—the man-beast charged. With a bestial roar he charged.
