light revealed more clearly to the keen eyes of the ape-man the topography of the country they were traversing, and then it was that he saw they were ascending a narrow, thickly wooded gorge, and he understood why the heavy vegetation had been invisible from the plain before Opar. Himself naturally uncommunicative, the woman's silence made no particular impression upon Tarzan. Had he had anything to say he should have said it, and likewise he assumed that there was no necessity for her speaking unless there was some good reason for speaking, for those who travel far and fast have no breath to waste upon conversation.
The eastern stars were fading at the first hint of coming dawn when the two scrambled up a precipitous bank that formed the upper end of the ravine, and came out upon comparatively level ground. As they advanced the sky lightened, and presently the woman halted at the edge of a declivity, and as the day broke Tarzan saw below him a wooded basin in the heart of the mountain, and, showing through the trees at what appeared to be some two or three miles distant, the outlines of a building that glistened and sparkled and scintillated in the light of the new sun. Then he turned and looked at his companion, and surprise and consternation were writ upon his face, for standing before him was La, the High Priestess of Opar.
'You?' he exclaimed. 'Now indeed will Cadj have the excuse that Dooth said he sought to put you out of the way.'
'He will never have the opportunity to put me out of the way,' replied La, 'for I shall never return to Opar.'
'Never return to Opar!' he exclaimed, 'then where are you going? Where can you go?'
'I am going with you,' she replied. 'I do not ask that you love me. I only ask that you take me away from Opar and from the enemies who would slay me. There was no other way. Manu, the monkey, overheard them plotting, and he came to me and told me all that they would do. Whether I saved you or sacrificed you, it had all been the same with me. They were determined to do away with me, that Oah might be High Priestess and Cadj king of Opar. But I should not have sacrificed you, Tarzan, under any circumstances, and this, then, seemed the only way in which we might both be saved. We could not go to the north or the west across the plain of Opar for there Cadj has placed warriors in ambush to waylay you, and though you be Tarzan and a mighty fighter, they would overwhelm you by their very numbers and slay you.'
'But where are you leading me?' asked Tarzan.
'I have chosen the lesser of two evils; in this direction lies an unknown country, filled for us Oparians with legends of grim monsters and strange people. Never has an Oparian ventured here and returned again to Opar. But if there lives in all the world a creature who could win through this unknown valley, it be you, Tarzan of the Apes.'
'But if you know nothing of this country, or its inhabitants,' demanded Tarzan, 'how is it that you so well know the trail that leads to it?'
'We well know the trail to the summit, but that is as far as I have ever been before. The great apes and the lions use this trail when they come down into Opar. The lions, of course, cannot tell us where it leads, and the great apes will not, for usually we are at war with them. Along this trail they come down into Opar to steal our people, and upon this trail we await to capture them, for often we offer a great ape in sacrifice to the Flaming God, or rather that was our former custom, but for many years they have been too wary for us, the toll being upon the other side, though we do not know for what purpose they steal our people, unless it be that they eat them. They are a very powerful race, standing higher than Bolgani, the gorilla, and infinitely more cunning, for, as there is ape blood in our veins, so is there human blood in the veins of these great apes that dwell in the valley above Opar.'
'Why is it, La, that we must pass through this valley in order to escape from Opar? There must be some other way.
'There is no other way, Tarzan of the Apes,' she replied. 'The avenues across the valley are guarded by Cadj's people. Our only chance of escape lies in this direction, and I have brought you along the only trail that pierces the precipitous cliffs that guard Opar upon the south. Across or around this valley we must go in an attempt to find an avenue across the mountain and down upon the other side.'
The ape-man stood gazing down into the wooded basin below them, his mind occupied with the problems of the moment. Had he been alone he would not have come this way, for he was sufficiently confident of his own prowess to believe that he might easily have crossed the valley of Opar in comparative safety, regardless of Cadj's plans to the contrary. But he was not alone. He had now to think of La, and he realized that in her efforts to save him she had placed him under a moral obligation which he might not disregard.
To skirt the basin, keeping as far as possible from the building, which he could see in the distance, seemed the wisest course to pursue, since, of course, his sole purpose was to find a way across the mountain and out of this inhospitable country. But the glimpses he caught of the edifice, half concealed as it was amid the foliage of great trees, piqued his curiosity to such an extent that he felt an almost irresistible urge to investigate. He did not believe that the basin was inhabited by other than wild beasts, and he attributed the building which he saw to the handiwork of an extinct or departed people, either contemporaneous with the ancient Atlantians who had built Opar or, perhaps, built by the original Oparians themselves, but now forgotten by their descendants. The glimpses which he caught of the building suggested such size and magnificence as might belong to a palace.
The ape-man knew no fear, though he possessed to a reasonable extent that caution which is inherent in all wild beasts. He would not have hesitated to pit his cunning and his prowess against the lower orders, however ferocious they might be, for, unlike man, they could not band together to his undoing. But should men elect to hunt him in numbers he knew that a real danger would confront him, and that, in the face of their combined strength and intelligence, his own might not avail him. There was little likelihood, however, he reasoned, that the basin was inhabited by human beings. Doubtless closer investigation of the building he saw would reveal that it was but a deserted ruin, and that the most formidable foes he would encounter would be the great apes and the lions. Of neither of these had he any fear; with the former it was even reasonable to imagine that he might establish amicable relations. Believing as he did that he must look for egress from the basin upon its opposite side, it was only natural that he should wish to choose the most direct route across the basin. Therefore his inclinations to explore the valley were seconded by considerations of speed and expediency.
'Come,' he said to La, and started down the declivity which led into the basin in the direction of the building ahead of them.
'You are not going that way?' she cried in astonishment.
'Why not?' he said. 'It is the shortest way across the valley, and in so far as I can judge our trail over the mountains is more likely to lie in that direction than elsewhere.'
'But I am afraid,' she said. 'The Flaming God alone knows what hideous dangers lurk in the depths of that forest below us.
'Only Numa and the Mangani,' he said. 'Of these we need have no fear.'
'You fear nothing,' she said, 'but I am only a woman.'
'We can die but once,' replied Tarzan, 'and that once we must die. To be always fearing, then, would not avert it, and would make life miserable. We shall go the short way, then, and perhaps we shall see enough to make the risk well worth while.'
They followed a well-worn trail downward among the brush, the trees increasing in both size and number as they approached the floor of the basin, until at last they were walking beneath the foliage of a great forest. What wind there was was at their back, and the ape-man, though he moved at a swinging walk, was constantly on the alert. Upon the hard-packed earth of the trail there were few signs to indicate the nature of the animals that had passed to and fro, but here and there the spoor of a lion was in evidence. Several times Tarzan stopped and listened, often he raised his head and his sensitive nostrils dilated as he sought for whatever the surrounding air might hold for him.
'I think there are men in this valley,' he said presently. 'For some time I have been almost positive that we are being watched. But whoever is stalking us is clever beyond words, for it is only the barest suggestion of another presence that I can scent.'
La looked about apprehensively and drew close to his side. 'I see no one,' she said, in a low voice.
'Nor I,' he replied. 'Nor can I catch any well-defined scent spoor, yet I am positive that someone is following us. Someone or something that trails by scent, and is clever enough to keep its scent from us. It is more than likely that, whatever it is, it is passing through the trees, at a sufficient height to keep its scent spoor always above us. The air is right for that, and even if he were up wind from us we might not catch his scentat all. Wait here, I will make sure,' and he swung lightly into the branches of a nearby tree and swarmed upward with the agility of Manu,
