Along one side of the rocky basin many other blacks were engaged in quarrying the granite from the cliffs, which had been cut away through similar operations into a series of terraces running from the floor of the basin to the summit of the cliff. Here naked blacks toiled with primitive tools under the supervision of savage Bolgani. The activities of the quarrymen were obvious enough, but what the others were bringing from the mouths of the tunnels Tarzan could not be positive, though the natural assumption was that it was gold. Where, then, did they obtain their diamonds? Certainly not from these solid granite cliffs.
A few minutes’ observation convinced Tarzan that the trail he had followed from the forest ended in this little cul-de-sac, and so he sought a way upward and around it, in search of a pass across the range.
The balance of that day and nearly all the next he devoted to his efforts in this direction, only in the end to be forced to admit that there was no egress from the valley upon this side. To points far above the timber line he made his way, but there, always, he came face to face with sheer, perpendicular cliffs of granite towering high above him, upon the face of which not even the ape-man could find foothold. Along the southern and eastern sides of the basin he carried his investigation, but with similar disappointing results, and then at last he turned his steps back toward the forest with the intention of seeking a way out through the valley of Opar with La, after darkness had fallen.
The sun had just risen when Tarzan arrived at the native village in which he had left La, and no sooner did his eyes rest upon it than he became apprehensive that something was amiss, for, not only was the gate wide open but there was no sign of life within the palisade, nor was there any movement of the swinging huts that would indicate that they were occupied. Always wary of ambush, Tarzan reconnoitered carefully before descending into the village. To his trained observation it became evident that the village had been deserted for at least twenty-four hours. Running to the hut in which La had been hidden he hastily ascended the rope and examined the interior—it was vacant, nor was there any sign of the High Priestess. Descending to the ground, the ape-man started to make a thorough investigation of the village in search of clews to the fate of its inhabitants and of La. He had examined the interiors of several huts when his keen eyes noted a slight movement of one of the swinging, cage-like habitations some distance from him. Quickly he crossed the intervening space, and as he approached the hut he saw that no rope trailed from its doorway. Halting beneath, Tarzan raised his face to the aperture, through which nothing but the roof of the hut was visible.
“Gomangani,” he cried, “it is I, Tarzan of the Apes. Come to the opening and tell me what has become of your fellows and of my mate, whom I left here under the protection of your warriors.”
There was no answer, and again Tarzan called, for he was positive that someone was hiding in the hut.
“Come down,” he called again, “or I will come up after you.”
Still there was no reply. A grim smile touched the ape-man’s lips as he drew his hunting knife from its sheath and placed it between his teeth, and then, with a cat-like spring, leaped for the opening, and catching its sides, drew his body up into the interior of the hut.
If he had expected opposition, he met with none, nor in the dimly lighted interior could he at first distinguish any presence, though, when his eyes became accustomed to the semi-darkness, he descried a bundle of leaves and grasses lying against the opposite wall of the structure. Crossing to these he tore them aside revealing the huddled form of a terrified woman. Seizing her by a shoulder he drew her to a sitting position.
“What has happened?” he demanded. “Where are the villagers? Where is my mate?”