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 rection could Tarzan depend in his search for the fallen plane. He could not even judge accurately as to the distance it might lie from him, and he knew that from the moment that it disappeared beyond the hills it might have traveled a considerable distance at right angles to its original course before it crashed to earth. If its occupants were killed or badly injured the ape-man might search futilely in their immediate vicinity for some time before finding them.

There was but one thing to do and that was to travel to a point as close as possible to where he judged the plane had landed, and then to follow in ever-widening circles until he picked up their scent spoor. And this he did.

Before he left the valley of plenty he made several kills and carried the choicest cuts of meat with him, leaving all the dead weight of bones behind. The dense vegetation of the jungle terminated at the foot of the western slope, growing less and less abundant as he neared the summit beyond which was a sparse growth of sickly scrub and sunburned grasses, with here and there a gnarled and hardy tree that had withstood the vicissitudes of an almost waterless existence.

From the summit of the hills Tarzan's keen eyes searched the arid landscape before him. In the distance he discerned the ragged tortuous lines that marked the winding course of the hideous gorges which scored the broad plain at intervals—the terrible gorges that had so nearly claimed his life in