"Go away, Bolgani!" commanded Tarzan in the language of the great apes. "The she is mine. Go away, or I kill!"

Buckingham did not understand the tongue of this stranger, but he understood the menace of his attitude. "Go away!" he cried in English. "Go away, or I will kill you!" Thus a beast spoke in English to an Englishman who spoke the language of beasts!

Tarzan of the Apes is not easily astonished; but when he heard Bolgani, the gorilla, speak to him in English he at first questioned his hearing and then his sanity. But whatever the condition of either it could not conceal the evident intent of the bull gorilla advancing menacingly toward him as it beat its breast and screamed its threats.

Naomi Madison watched with horror-wide, fascinated eyes. She saw the man she thought to be Stanley Obroski crouch slightly as though waiting to receive the charge. She wondered why he did not turn and run—that was what all who knew him, including herself, would have expected of Stanley Obroski.

Suddenly the gorilla charged, and still the man held his ground. Great hairy paws reached out to seize him; but he eluded them with quick, pantherlike movements. Stooping, he sprang beneath a swinging arm; and before the beast could turn leaped upon its back. A bronzed arm encircled the squat neck of the hairy Buckingham. In a frenzy of rage the beast swung around, clawing futilely to rid himself of his antagonist.

He felt the steel thews of the ape-man's arm tightening, and realized that he was coping with muscles far beyond what he had expected. He threw himself to the ground in an effort to crush his foe with his great weight, but Tarzan broke the fall with his feet and slipped partially from beneath the hairy body.

Then Buckingham felt powerful jaws close upon his neck near the jugular, he heard savage growls mingling with his own. Naomi Madison heard too, and a new horror filled her soul. Now she knew why Stanley Obroski had not fled in terror—he had gone mad! Fear and suffering had transformed him into a maniac.

She shuddered at the thought, she shrank within herself as she saw his strong white teeth sink into the black hide of the gorilla and heard the bestial growls rumbling from that handsome mouth.

The two beasts rolled over and over upon the ground, the roars of the gorilla mingling with the growls of the man; and the girl, leaning upon her hands, watched through fascinated, horror stricken eyes.

She knew that there could be but one outcome—even though the man appeared to have a slight initial advantage, the giant strength of the mighty bull must prevail in the end. Then she saw a knife flash, reflecting the rays of the morning sun. She saw it driven into the great bull's side. She heard his agonized shriek of pain and rage. She saw him redouble his efforts to dislodge the creature clinging to his back.