They had been walking side by side and there had been men and lions to the right and left of them, and men and lions in front and behind. The ape-man was puzzled by the possibilities suggested by the tracks, but in the light of any previous experience he could not explain satisfactorily to himself what his perceptions indicated.
There was little change in the formation of the gorge; it still wound its erratic course between precipitous cliffs. In places it widened out and again it became very narrow and always deeper the further south they traveled. Presently the bottom of the gorge began to slope more rapidly. Here and there were indications of ancient rapids and waterfalls. The trail became more difficult but was well marked and showed indications of great antiquity, and, in places, the handiwork of man. They had proceeded for a half or three-quarters of a mile when, at a turning of the gorge, Tarzan saw before him a narrow valley cut deep into the living rock of the earth's crust, with lofty mountain ranges bounding it upon the south. How far it extended east and west he could not see, but apparently it was no more than three or four miles across from north to south.
That it was a well-watered valley was indicated by the wealth of vegetation that carpeted its floor from the rocky cliffs upon the north to the mountains on the south.
Over the edge of the cliffs from which the ape-man viewed the valley a trail had been hewn that led downward to the base. Preceded by the lion Tarzan descended into the valley, which, at this point, was forested with large trees. Before him the trail wound onward toward the center of the valley. Raucous-voiced birds of brilliant plumage screamed among the branches while innumerable monkeys chattered and scolded above him.
The forest teemed with life, and yet there was borne in upon the ape-man a sense of unutterable loneliness, a sensation that he never before had felt in his beloved jungles. There was unreality in everything about him—in the valley itself, lying hidden and forgotten in what was supposed to be an arid waste. The birds and the monkeys, while similar in type to many with which he was familiar, were identical with none, nor was the vegetation without its idiosyncrasies. It was as though he had been suddenly transported to another world and he felt a strange restlessness that might easily have been a premonition of danger.
Fruits were growing among the trees and some of these he saw that Manu, the monkey, ate. Being hungry he swung to the lower branches and, amidst a great chattering of the monkeys, proceeded to eat such of the fruit as he saw the monkeys ate in safety. When he had partially satisfied his hunger, for meat alone could fully do so, he looked about him for Numa of the pit to discover that the lion had gone.
Chapter XVII
The Walled City
Dropping to the ground once more he picked up the trail of the girl and her captors, which he followed easily along what appeared to be a well-beaten trail. It was not long before he came to a small stream, where he quenched his thirst, and thereafter he saw that the trail followed in the general direction of the stream, which ran southwesterly. Here and there were cross trails and others which joined the main avenue, and always upon each of them were the tracks and scent of the great cats, of Numa, the lion, and Sheeta, the panther.