file after the manner of beasts moving along a none too wide trail; but there was nothing to indicate that either rider was Nat-ul.

For an instant he hesitated, and then his judgment told him to keep on after the main body, for if Nat-ul was a prisoner she would be with the larger force—not riding in the opposite direction with a single guard. Even as he turned to take up the pursuit again there came faintly to his ears from the jungle at his left the sound of a human voice—it was a woman's, raised in frightened protest.

Like a deer Nu turned and leaped in the direction of that familiar voice. The fleet wolfhound was put to it to keep pace with the agile caveman, for Nu had left the earth and taken to the branches of the trees where no underbrush retarded his swift flight. From tree to tree he leaped or swung, sometimes hurling his body twenty feet through the air from one jungle giant to another. Below him raced the panting Terkoz, red tongue lolling from his foam flecked mouth; but with all their speed the two moved with the noiselessness of shadowy ghosts.

At the edge of the jungle Nu came upon a park-like forest, and well into this he saw a white robed Arab forcing a woman slowly backward across his knee. One sinewy, brown hand clutched her throat, the other was raised to strike her in the face.

Nu saw that he could not reach the man in time to prevent the blow, but he might distract his attention for the moment that would be required for him to reach his side. From his throat there rose the savage war cry of his long dead people—a cry that brought a hundred jungle creatures to their feet trembling in fear or in rage according to their kind. And it brought Abul Mukarram upstanding too, for in all his life he had never heard the like of that blood-freezing challenge.

At the sight which met his eyes he dropped the girl and darted toward his donkey where hung his long barreled rifle in its boot. Victoria Custer looked, too, and what she saw brought unutterable relief and happiness to her. Then the Arab had turned with levelled gun just as the caveman leaped upon him. There was the report of the firearm ere it was wrenched from Abul Mukarram's grasp and hurled to one side, but the bullet went wide of its mark and the next instant the girl saw the two men locked in what she knew was a death struggle. The Arab struck mighty blows at the head and face of his antagonist, while the caveman, the great muscles rolling beneath his smooth hide, sought for a hold upon the other's throat.

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