As he descended the way became easier, though on several occasions he was again compelled to resort to his rope to lower himself from one level to another. Then the steep crags gave place to leveler land upon the shoulders of the mighty range and here, where earth could find lodgment, vegetation commenced. Grasses and shrubs, at first, then stunted trees and finally what was almost a forest, and here he came upon a trail. It was a trail that offered infinite variety. For a while it wound through a forest and then climbed to a ledge of rock that projected from the face of a cliff and overhung a stupendous canyon. He could not see the trail far ahead for it was continually rounding the shoulders of jutting crags. As he moved along it, sure-footed, silent, alert, Tarzan of the Apes became aware that somewhere ahead of him other feet were treading probably the same trail. What wind there was was eddying up from the canyon below and carrying the scent spoor of the creature ahead of him as well as his own up toward the mountain top, so that it was unlikely that either might apprehend the presence of the other by scent; but there was something in the sound of the footsteps that even at a distance assured Tarzan that they were not made by man, and it was evident too that they were going in the same direction as he for they were not growing rapidly more distinct, but very gradually as though he was slowly overhauling the author of them. The trail was narrow and only occasionally, where it crossed some ravine or shallow gulley, was there a place where one might either descend or ascend from it. To meet a savage beast upon it, therefore, might prove, to say the least, embarrassing but Tarzan had elected to go this way and he was not in the habit of turning back whatever obstacles in the form of man or beast might bar his way. And, too, he had the advantage over the creature ahead of him whatever it might be, since he was coming upon it from behind and was quite sure that it had no knowledge of his presence, for Tarzan well knew that no creature could move with greater silence than he, when he elected to do so, and now he passed along that trail as noiselessly as the shadow of a shadow. Curiosity caused him to increase his speed that he might learn the nature of the thing ahead, and as he did so and the sound of its footsteps increased in volume, he knew that he was stalking some heavy, four-footed beast with padded feet--that much he could tell, but beyond that he had no idea of the identity of the creature; nor did the winding trail at any time reveal it to his view. Thus the silent stalker pursued his way until he knew that he was but a short distance behind his quarry when there suddenly broke upon his ears the horrid snarling and growling of an enraged beast just ahead of him.