far upward toward the summit. This, then, would be as good a place to commence his investigations as another. And so, seeing that the coast was clear, the ape-man descended from the trees, and taking advantage of the underbrush bordering the trail, made his way silently, yet swiftly, into the hills. For the most part he was compelled to worm his way through thickets, for the trail was in constant use by Gomangani and Bolgani, parties passing up it empty-handed and, returning, bearing blocks of granite. As he advanced more deeply into the hills the heavy underbrush gave way to a lighter growth of scrub, through which he could pass with far greater ease though with considerable more risk of discovery. However, the instinct of the beast that dominated Tarzan's jungle craft permitted him to find cover where another would have been in full view of every enemy. Half way up the mountain the trail passed through a narrow gorge, not more than twenty feet wide and eroded from solid granite cliffs. Here there was no concealment whatsoever, and the ape-man realized that to enter it would mean almost immediate discovery. Glancing about, he saw that by making a slight detour he could reach the summit of the gorge, where, amid tumbled, granite boulders and stunted trees and shrubs, he knew that he could find sufficient concealment, and perhaps a plainer view of the trail beyond.
Nor was he mistaken, for, when he had reached a vantage point far above the trail, he saw ahead an open pocket in the mountain, the cliffs surrounding which were honeycombed with numerous openings, which, it seemed to Tarzan, could be naught else than the mouths of tunnels. Rough wooden ladders reached to some of them, closer to the base of the cliffs, while from others knotted ropes dangled to the ground below. Out of these tunnels emerged men carrying little sacks of earth, which they dumped in a common pile beside a rivulet which ran through the gorge. Here other blacks, supervised by Bolgani, were engaged in washing the dirt, but what they hoped to find or what they did find, Tarzan could not guess.
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?'
'Do not kill me! Do not kill me!' she cried. 'It was not I. It was not my fault.'
'I do not intend to kill you,' replied Tarzan. 'Tell me the truth and you shall be safe.'
'The Bolgani have taken them away,' cried the woman. 'They came when the sun was low upon the day that you arrived, and they were very angry, for they had found the body of their fellow outside the gate of the Palace of Diamonds . They knew that he had come here to our village, and no one had seen him alive since he had departed from the palace. They came, then, and threatened and tortured our people, until at last the warriors told them all. I hid. I do not know why they did not find me. But at last they went away, taking all the others with them; taking your mate, too. They will never come back.'
'You think that the Bolgani will kill them?' asked Tarzan.
'Yes,' she replied, 'they kill all who displease them.'
Alone, now, and relieved of the responsibility of La, Tarzan might easily make his way by night through the valley of Opar and to safety beyond the barrier. But perhaps such a thought never entered his head. Gratitude and loyalty were marked characteristics of the ape-man. La had saved him from the fanaticism and intrigue of her people. She had saved him at a cost of all that was most dear to her, power and position, peace and safety. She had jeopardized her life for him, and become an exile from her own country. The mere fact then that the Bolgani had taken her with the possible intention of slaying her, was not sufficient for the ape-man. He must know whether or not she lived, and if she lived he must devote his every energy to winning her release and her eventual escape from the dangers of this valley.
Tarzan spent the day reconnoitering outside the palace grounds, seeking an opportunity of gaining entrance without detection, but this he found impossible inasmuch as there was never a moment that there were not Gomangani or Bolgani in the outer garden. But with the approach of darkness the great east gate was closed, and the inmates of the huts and palace withdrew within their walls, leaving not even a single sentinel without—a fact that indicated clearly that the Bolgani had no reason to apprehend an attack. The subjugation of the Gomangani, then, was apparently complete, and so the towering wall surrounding their palace, which was more than sufficient to protect them from the inroads of lions, was but the reminder of an ancient day when a once powerful, but now vanished, enemy threatened their peace and safety.
When darkness had finally settled Tarzan approached the gate, and throwing the noose of his grass rope over one of the carved lions that capped the gate posts, ascended quickly to the summit of the wall, from where he dropped lightly into the garden below. To ensure an avenue for quick escape in the event that he found La, he unlatched the heavy gates and swung them open. Then he crept stealthily toward the ivy-covered east tower, which he had chosen after a day of investigation as offering easiest ingress to the palace. The success of his plan hinged largely upon the age and strength of the ivy which grew almost to the summit of the tower, and, to his immense relief, he found that it would easily support his weight.
Far above the ground, near the summit of the tower, he had seen from the trees surrounding the palace an open window, which, unlike the balance of those in this part of the palace, was without bars. Dim lights shone from several of the tower windows, as from those of other parts of the palace. Avoiding these lighted apertures, Tarzan ascended quickly, though carefully, toward the unbarred window above, and as he reached it and cautiously raised his eyes above the level of the sill, he was delighted to find that it opened into an unlighted chamber, the interior of which, however, was so shrouded in darkness that he could discern nothing within. Drawing himself carefully to the level of the sill he crept quietly into the apartment beyond. Groping through the blackness, he cautiously made the rounds of the room, which he found to contain a carved bedstead of peculiar design, a table, and a couple of
