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 him 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.

The girl, ascending, screamed savage encouragement; the horrid mutants gibbered and shrieked. Above them all, Rhonda turned at the savage sounds and looked down. With parted lips, her hand pressed to her heart, she watched with dismay and horror.

Crouching, Tarzan met the charge. The man-beast fought without science but with great strength and ferocity. Whatever thin veneer of civilization his contacts with men had imparted to the ape-man vanished now. Here was a beast meeting a beast.

A low growl rumbled from the throat of the lord of the jungle, snarling-muscles drew back his lip to expose strong, white teeth, the primitive weapons of the first man.

Like charging bulls they came together, and like mad panthers each sought the other's throat. Locked in feral embrace they swayed a moment upon the ledge; then they toppled over the brink.

At that moment Rhonda Terry surrendered the last vestige of hope. She had ascended the cliff to a point beyond which she could discover no foothold for further progress. The man whom she believed to be Stanley Obroski, whose newly discovered valor had become the sole support of whatever hope of escape she might have entertained, was already as good as dead; for if the fall did not kill him the creatures swarming up the cliff toward him would. Yet self-pity was submerged in the grief she felt for the fate of the man. Her original feeling of contempt for him had changed to one of admiration, and this had grown into an emotion that she could scarcely have analyzed herself. It was something stronger than friendship; perhaps it was love. She did not want to see him die; yet, fascinated, her eyes clung to the scene below.

But Tarzan had no mind to die now. In ferocity, in strength, he was equal to his antagonist; in courage and intellect, he was his superior. It was by his own intelligent effort that the two had so quickly plunged from the ledge to another a few feet below; and as he had directed the fall, so he directed the manner of their alighting. The man-beast was underneath; Tarzan was on top.