Behind him that morning another white man pondered something he had heard during the night and very nearly did he give up his project and turn back upon his trail. It was Werper, the murderer, who in the still of the night had heard far away upon the trail ahead of him a sound that had filled his cowardly soul with terror--a sound such as he never before had heard in all his life, nor dreamed that such a frightful thing could emanate from the lungs of a God- created creature. He had heard the victory cry of the bull ape as Tarzan had screamed it forth into the face of Goro, the moon, and he had trembled then and hidden his face; and now in the broad light of a new day he trembled again as he recalled it, and would have turned back from the nameless danger the echo of that frightful sound seemed to portend, had he not stood in even greater fear of Achmet Zek, his master.
And so Tarzan of the Apes forged steadily ahead toward Opar's ruined ramparts and behind him slunk Werper, jackal-like, and only God knew what lay in store for each.
At the edge of the desolate valley, overlooking the golden domes and minarets of Opar, Tarzan halted. By night he would go alone to the treasure vault, reconnoitering, for he had determined that caution should mark his every move upon this expedition.
With the coming of night he set forth, and Werper, who had scaled the cliffs alone behind the ape-man's party, and hidden through the day among the rough boulders of the mountain top, slunk stealthily after him. The boulder-strewn plain between the valley's edge and the mighty granite kopje, outside the city's walls, where lay the entrance to the passage-way leading to the treasure vault, gave the Belgian ample cover as he followed Tarzan toward Opar.
He saw the giant ape-man swing himself nimbly up the face of the great rock. Werper, clawing fearfully during the perilous ascent, sweating in terror, almost palsied by fear, but spurred on by avarice, following upward, until at last he stood upon the summit of the rocky hill.
Tarzan was nowhere in sight. For a time Werper hid behind one of the lesser boulders that were scattered over the top of the hill, but, seeing or hearing nothing of the Englishman, he crept from his place of concealment to undertake a systematic search of his surroundings, in the hope that he might discover the location of the treasure in ample time to make his escape before Tarzan returned, for it was the Belgian's desire merely to locate the gold, that, after Tarzan had departed, he might come in safety with his followers and carry away as much as he could transport.
He found the narrow cleft leading downward into the heart of the kopje along well-worn, granite steps. He advanced quite to the dark mouth of the tunnel into which the runway disappeared; but here he halted, fearing to enter, lest he meet Tarzan returning.
The ape-man, far ahead of him, groped his way along the rocky passage, until he came to the ancient wooden door. A moment later he stood within the treasure chamber, where, ages since, long-dead hands had ranged the lofty rows of precious ingots for the rulers of that great continent which now lies submerged beneath the waters of the Atlantic.
No sound broke the stillness of the subterranean vault. There was no evidence that another had discovered the forgotten wealth since last the ape-man had visited its hiding place.
Satisfied, Tarzan turned and retraced his steps toward the summit of the kopje. Werper, from the concealment of a jutting, granite shoulder, watched him pass up from the shadows of the stairway and advance toward the edge of the hill which faced the rim of the valley where the Waziri awaited the signal of their master. Then Werper, slipping stealthily from his hiding place, dropped into the somber darkness of the entrance and disappeared.
Tarzan, halting upon the kopje's edge, raised his voice in the thunderous roar of a lion. Twice, at regular intervals, he repeated the call, standing in attentive silence for several minutes after the echoes of the third call had died away. And then, from far across the valley, faintly, came an answering roar--once, twice, thrice. Basuli, the Waziri chieftain, had heard and replied.
Tarzan again made his way toward the treasure vault, knowing that in a few hours his blacks would be with him, ready to bear away another fortune in the strangely shaped, golden ingots of Opar. In the meantime he would carry as much of the precious metal to the summit of the kopje as he could.
Six trips he made in the five hours before Basuli reached the kopje, and at the end of that time he had transported forty-eight ingots to the edge of the great boulder, carrying upon each trip a load which might well have staggered two ordinary men, yet his giant frame showed no evidence of fatigue, as he helped to raise his ebon warriors to the hill top with the rope that had been brought for the purpose.
Six times he had returned to the treasure chamber, and six times Werper, the Belgian, had cowered in the black shadows at the far end of the long vault. Once again came the ape-man, and this time there came with him fifty fighting men, turning porters for love of the only creature in the world who might command of their fierce and haughty natures such menial service. Fifty-two more ingots passed out of the vaults, making the total of one hundred which Tarzan intended taking away with him.
As the last of the Waziri filed from the chamber, Tarzan turned back for a last glimpse of the fabulous wealth upon which his two inroads had made no appreciable impression. Before he extinguished the single candle he had brought with him for the purpose, and the flickering light of which had cast the first alleviating rays into the impenetrable darkness of the buried chamber, that it had known for the countless ages since it had lain forgotten of man, Tarzan's mind reverted to that first occasion upon which he had entered the treasure vault, coming upon it by chance as he fled from the pits beneath the temple, where he had been hidden by La, the High Priestess of the Sun Worshipers.
He recalled the scene within the temple when he had lain stretched upon the sacrificial altar, while La, with high- raised dagger, stood above him, and the rows of priests and priestesses awaited, in the ecstatic hysteria of fanaticism, the first gush of their victim's warm blood, that they might fill their golden goblets and drink to the glory of their Flaming God.
The brutal and bloody interruption by Tha, the mad priest, passed vividly before the ape-man's recollective eyes, the flight of the votaries before the insane blood lust of the hideous creature, the brutal attack upon La, and his own part of the grim tragedy when he had battled with the infuriated Oparian and left him dead at the feet of the priestess he would have profaned.
This and much more passed through Tarzan's memory as he stood gazing at the long tiers of dull-yellow metal. He wondered if La still ruled the temples of the ruined city whose crumbling walls rose upon the very foundations about him. Had she finally been forced into a union with one of her grotesque priests? It seemed a hideous fate, indeed, for one so beautiful. With a shake of his head, Tarzan stepped to the flickering candle, extinguished its feeble rays and turned toward the exit.
Behind him the spy waited for him to be gone. He had learned the secret for which he had come, and now he could return at his leisure to his waiting followers, bring them to the treasure vault and carry away all the gold that they could stagger under.
The Waziri had reached the outer end of the tunnel, and were winding upward toward the fresh air and the welcome starlight of the kopje's summit, before Tarzan shook off the detaining hand of reverie and started slowly after them.
Once again, and, he thought, for the last time, he closed the massive door of the treasure room. In the darkness behind him Werper rose and stretched his cramped muscles. He stretched forth a hand and lovingly caressed a golden ingot on the nearest tier. He raised it from its immemorial resting place and weighed it in his hands. He clutched it to his bosom in an ecstasy of avarice.
Tarzan dreamed of the happy homecoming which lay before him, of dear arms about his neck, and a soft cheek pressed to his; but there rose to dispel that dream the memory of the old witch-doctor and his warning.
And then, in the span of a few brief seconds, the hopes of both these men were shattered. The one forgot even his greed in the pani
c of terror--the other was plunged into total forgetfulness of the past by a jagged fragment of rock which gashed a deep cut upon his head.
CHAPTER V
THE ALTAR OF THE FLAMING GOD
IT WAS AT the moment that Tarzan turned from the closed door to pursue his way to the outer world. The thing came without warning. One instant all was quiet and stability-- the next, and the world rocked, the tortured sides of the narrow passageway split and crumbled, great blocks of granite, dislodged from the ceiling, tumbled into the narrow way, choking it, and the walls bent inward upon the wreckage. Beneath the blow of a fragment of the roof, Tarzan staggered back against the door to the treasure room, his weight pushed it open and his body rolled inward upon the floor.
In the great apartment where the treasure lay less damage was wrought by the earthquake. A few ingots toppled from the higher tiers, a single piece of the rocky ceiling splintered off and crashed downward to the floor, and the walls cracked, though they did not collapse.
There was but the single shock, no other followed to complete the damage undertaken by the first. Werper, thrown to his length by the suddenness and violence of the disturbance, staggered to his feet when he found himself unhurt. Groping his way toward the far end of the chamber, he sought the candle which Tarzan had left stuck in its own wax upon the protruding end of an ingot.
By striking numerous matches the Belgian at last found what he sought, and when, a moment later, the sickly rays relieved the Stygian darkness about him, he breathed a nervous sigh of relief, for the impenetrable gloom had accentuated the terrors of his situation.
As they became accustomed to the light the man turned his eyes toward the door--his one thought now was of escape from this frightful tomb--and as he did so he saw the body of the naked giant lying stretched upon the floor just within the doorway. Werper drew back in sudden fear of detection; but a second glance convinced him that the Englishman was dead. From a great gash in the man's head a pool of blood had collected upon the concrete floor.
Quickly, the Belgian leaped over the prostrate form of his erstwhile host, and without a thought of succor for the man in whom, for aught he knew, life still remained, he bolted for the passageway and safety.
But his renewed hopes were soon dashed. Just beyond the doorway he found the passage completely clogged and choked by impenetrable masses of shattered rock. Once more he turned and re-entered the treasure vault. Taking the candle from its place he commenced a systematic search of the apartment, nor had he gone far before he discovered another door in the opposite end of the room, a door which gave upon creaking hinges to the weight of his body. Beyond the door lay another narrow passageway. Along this Werper made his way, ascending a flight of stone steps to another corridor twenty feet above the level of the first. The flickering candle lighted the way before him, and a moment later he was thankful for the possession of this crude and antiquated luminant, which, a few hours before he might have looked upon with contempt, for it showed him, just in time, a yawning pit, apparently terminating the tunnel he was traversing.
Before him was a circular shaft. He held the candle above it and peered downward. Below him, at a great distance, he saw the light reflected back from the surface of a pool of water. He had come upon a well. He raised the candle above his head and peered across the black void, and there upon the opposite side he saw the continuation of the tunnel; but how was he to span the gulf?
As he stood there measuring the distance to the opposite side and wondering if he dared venture so great a leap, there broke suddenly upon his startled ears a piercing scream which diminished gradually until it ended in a series of dismal moans. The voice seemed partly human, yet so hideous that it might well have emanated from the tortured throat of a lost soul, writhing in the fires of hell.
The Belgian shuddered and looked fearfully upward, for the scream had seemed to come from above him. As he looked he saw an opening far overhead, and a patch of sky pinked with brilliant stars.
His half-formed intention to call for help was expunged by the terrifying cry--where such a voice lived, no human creatures could dwell. He dared not reveal himself to whatever inhabitants dwelt in the place above him. He cursed himself for a fool that he had ever embarked upon such a mission. He wished himself safely back in the camp of Achmet Zek, and would almost have embraced an opportunity to give himself up to the military authorities of the Congo if by so doing he might be rescued from the frightful predicament in which he now was.
He listened fearfully, but the cry was not repeated, and at last spurred to desperate means, he gathered himself for the leap across the chasm. Going back twenty paces, he took a running start, and at the edge of the well, leaped upward and outward in an attempt to gain the opposite side.
In his hand he clutched the sputtering candle, and as he took the leap the rush of air extinguished it. In utter darkness he flew through space, clutching outward for a hold should his feet miss the invisible ledge.
He struck the edge of the door of the opposite terminus of the rocky tunnel with his knees, slipped backward, clutched desperately for a moment, and at last hung half within and half without the opening; but he was safe. For several minutes he dared not move; but clung, weak and sweating, where he lay. At last, cautiously, he drew himself well within the tunnel, and again he lay at full length upon the floor, fighting to regain control of his shattered nerves.
When his knees struck the edge of the tunnel he had dropped the candle. Presently, hoping against hope that it had fallen upon the floor of the passageway, rather than back into the depths of the well, he rose upon all fours and commenced a diligent search for the little tallow cylinder, which now seemed infinitely more precious to him than all the fabulous wealth of the hoarded ingots of Opar.
And when, at last, he found it, he clasped it to him and sank back sobbing and exhausted. For many minutes he lay trembling and broken; but finally he drew himself to a sitting posture, and taking a match from his pocket, lighted the stump of the candle which remained to him. With the light he found it easier to regain control of his nerves, and presently he was again making his way along the tunnel in search of an avenue of escape. The horrid cry that had come down to him from above through the ancient well-shaft still haunted him, so that he trembled in terror at even the sounds of his own cautious advance.
He had gone forward but a short distance, when, to his chagrin, a wall of masonry barred his farther progress, closing the tunnel completely from top to bottom and from side to side. What could it mean? Werper was an educated and intelligent man. His military training had taught him to use his mind for the purpose for which it was intended. A blind tunnel such as this was senseless. It must continue beyond the wall. Someone, at some time in the past, had had it blocked for an unknown purpose of his own. The man fell to examining the masonry by the light of his candle. To his delight he discovered that the thin blocks of hewn stone of which it was constructed were fitted in loosely without mortar or cement. He tugged upon one of them, and to his joy found that it was easily removable. One after another he pulled out the blocks until he had opened an aperture large enough to admit his body, then he crawled through into a large, low chamber. Across this another door barred his way; but this, too, gave before his efforts, for it was not barred. A long, dark corridor showed before him, but before he had followed it far, his candle burned down until it scorched his fingers. With an oath he dropped it to the floor, where it sputtered for a moment and went out.
Now he was in total darkness, and again terror rode heavily astride his neck. What further pitfalls and dangers lay ahead he could not guess; but that he was as far as ever from liberty he was quite willing to believe, so depressing is utter absence of light to one in unfamiliar surroundings.
Slowly he groped his way along, feeling with his hands upon the tunnel's walls, and cautiously with his feet ahead of him upon the floor before he could take a single forward step. How long he crept on thus he could not guess; but at last, feeling that th
e tunnel's length was interminable, and exhausted by his efforts, by terror, and loss of sleep, he determined to lie down and rest before proceeding farther.
When he awoke there was no change in the surrounding blackness. He might have slept a second or a day--he could not know; but that he had slept for some time was attested by the fact that he felt refreshed and hungry.
Again he commenced his groping advance; but this time he had gone but a short distance when he emerged into a room, which was lighted through an opening in the ceiling, from which a flight of concrete steps led downward to the floor of the chamber.
Above him, through the aperture, Werper could see sunlight glancing from massive columns, which were twined about by clinging vines. He listened; but he heard no sound other than the soughing of the wind through leafy branches, the hoarse cries of birds, and the chattering of monkeys.
Boldly he ascended the stairway, to find himself in a circular court. Just before him stood a stone altar, stained with rusty-brown discolorations. At the time Werper gave no thought to an explanation of these stains--later their origin became all too hideously apparent to him.
Beside the opening in the floor, just behind the altar, through which he had entered the court from the subterranean chamber below, the Belgian discovered several doors leading from the enclosure upon the level of the floor. Above, and circling the courtyard, was a series of open balconies. Monkeys scampered about the deserted ruins, and gaily plumaged birds flitted in and out among the columns and the galleries far above; but no sign of human presence was discernible. Werper felt relieved. He sighed, as though a great weight had been lifted from his shoulders. He took a step toward one of the exits, and then he halted, wide- eyed in astonishment and terror, for almost at the same instant a dozen doors opened in the courtyard wall and a horde of frightful men rushed in upon him.