He retreated hastily to the open air—noticing as he did so that the momentary trickle of water had ceased to flow; he felt that after inhaling that dreadful odour he must get a breath of fresh air; also, if he desired to explore the interior of that cavern, he must provide himself with a torch. Accordingly he retraced his steps across the glade, re-entered the forest, and proceeded to look about him for a few dry branches to serve as torches, some dry moss for tinder, and a couple of pieces of wood suitable for rubbing upon each other when it was desired to kindle a fire. These things were soon found, and Stukely was returning to the open glade with the perfect silence and caution which had now become habitual to him, when, as he parted the last branches of the scrub which shut him in, his quick eyes detected something moving along the base of the cliff toward the cave. A single glance sufficed to assure him that it was one of the large apes, almost as big as a man, which abounded in the forest; and he determined to remain where he was for a few moments and watch the creature; if the brute entered the cave, as seemed to be his intention, Stukely felt he might safely conclude that the jaguars, or whatever they might be, were not at home, and that consequently he might himself enter without the observance of quite so much precaution as he would otherwise have considered necessary.

As he had anticipated, the ape was evidently bound for the interior of the cavern, for upon arriving at the entrance the creature paused for a moment, appeared to sniff the air carefully for a second or two, and then went boldly in, somewhat to Stukely’s surprise, for although when he first saw the creature he gathered from its movements that it intended to enter the cave, he could not imagine why it should do so; for he knew perfectly well by this time that that particular species of ape lived in a tree, not in a cave. Then he recollected the water, and immediately came to the conclusion that there must be a spring or pond of some sort inside the cave to which the animals of the neighbourhood were accustomed to resort in order to quench their thirst. Yes, of course, that would be it, he told himself; and it would account in a perfectly natural manner for the many footprints which he had seen in the mud at the entrance. And, if that were the case, of course it would not be the den of a panther or other carnivorous animal at all; for monkeys, pigs, and antelopes would not frequent a spring in a cave which one or more of their most deadly enemies had made their lair. And yet—what about that abominable stench which issued from the cave; how was that to be accounted for? It was a difficult question to answer, and Stukely felt that there was but one way of getting at the truth, namely, by thoroughly examining the interior of the cavern. So, forgetting for the moment that he was out after game, and was not engaged upon an exploring expedition, he passed out through the parted scrub and headed straight for the mouth of the cave.

He had traversed about half the width of the glade when the sound of a sudden, loud splashing of water reached his ears, immediately followed by an outburst of the most appalling shrieks and yells; and a couple of seconds later out dashed the ape at a speed of which Stukely would never have believed the creature capable, had he not beheld it with his own eyes. The ape cleared the mouth of the cave as though he had been shot out of it, and came straight across the glade toward Phil. For an instant the latter thought that the simian had caught sight of him and, transported with rage, intended to attack him; so he halted, dropped his branches and tinder, and prepared to fit an arrow to his bow to repel the attack; but a second glance assured him that he was mistaken, for the monkey was not coming directly toward him, but would pass him at a distance of about a dozen paces. Moreover, it was more than likely that the creature did not even see him, for Phil could now see that the poor brute, as it dashed toward him in great, headlong bounds, with its long, hairy arms and hands stretched out before it, its eyes turned back in its head, and the most hideous shrieks issuing from its foaming jaws, was frantic with terror! In the drawing of half a dozen breaths the terrified beast had come up level with, dashed past him, and plunged headlong into the depths of the forest, where its yells at once raised a tremendous commotion among the parrots and other birds, to say nothing of the monkeys and jaguars that made it their home.

Phil meditatively gathered up the materials wherewith he proposed to illumine the interior of the cavern, and slowly resumed his way across the glade. Evidently there was something in the cavern after all, otherwise that poor ape would not have dashed out of it so precipitately, and in such a ghastly state of terror. But what could it be? It must be something even more formidable than a jaguar or a puma, to have terrified that unhappy monkey to the verge of madness; yet, so far as Phil knew, the jaguar was the most dreaded beast to be found in the South American forest. There was but one way of determining the point satisfactorily. So, completely forgetful now of the errand upon which he had started out, Stukely at once decided to adopt that way, which was, of course, to enter the cavern and see for himself.

Accordingly, having arrived within about thirty feet of the opening in the face of the sculptured rock, the young Englishman looked warily about him and peered into the interior of the cavern to make sure that there was no likelihood of his being attacked unawares; and when at length he had satisfied himself on this head, he laid down his bow and proceeded to arrange his dry moss so that it would kindle readily; then he took his two fire-producing sticks, rubbed them one against the other in the most approved manner, and presently had a little flame which he deftly communicated to the tinder-like moss. When this was fairly ablaze, he ignited the biggest and thickest branch he had with him, and was soon in possession of a brilliantly burning flambeau, holding which in one hand, and his bow and arrow in the other, he at once boldly plunged into the interior of the cavern, glancing keenly about him as he held his torch aloft.

The first thing that Phil noticed was that the fetid, charnel-house odour which had before assailed his nostrils was now, for some reason, not nearly so strong as when he had previously stood in the entrance of the cavern; indeed it was scarcely perceptible. The next thing to attract his attention was the fact that the cavern widened out very considerably as it receded into the interior of the rock, and that the floor slightly rose as he walked forward. Then the shimmer of water ahead in the light of the torch caught his eye, and when he had penetrated about fifty feet he suddenly found himself in a vast rock chamber, so large that the light of his torch could scarcely reach its farther extremity or its roof. And there was a peculiarity about this rock chamber which consisted in the fact that the whole of its interior, from wall to wall, was occupied by a pool of water which brimmed to the level of the highest part of the upward sloping entrance passage—nay, it did even more, for it occasionally slopped over and went trickling away in a tiny stream down the passage into the open, thus moistening the soil at the entrance and creating the mud in which Phil had detected the spoor of numerous different kinds of animals. A further circumstance which at once arrested Phil’s attention and caused him again to look sharply about him was that the surface of the pool, instead of being glass-smooth, as one would naturally expect water to be in a place completely sheltered from the wind, was considerably agitated, as though some creature of great bulk had recently been swimming in it. Yet, so far as he could observe, he was himself the only living creature in the cavern, and he could see to its farthest extremity pretty clearly, now that his eyes had become accustomed to the comparatively dim light of the torch. Moreover, upon carefully examining the rocky floor upon which he stood, the only wet footprints visible were those of the ape which had recently beaten so precipitate a retreat from the cavern, and Phil was quite certain that the creature had not been indulging in a swim, for he was prepared to swear that the brute’s fur was perfectly dry when it dashed past him on its way across the glade. No, so far as the ape was concerned, the signs indicated that it had waded into the water far enough to bend down and drink, and then had been suddenly and very badly frightened. Again Phil gazed about him, searching the obscurity on the far side of the cave, and now he noticed that there was another passage over there, a roughly circular hole about five feet in diameter, running still farther into the heart of the rock. He thought he would like to get across and explore that hole; but how was he to do so? Of course he might swim across the water; but that idea did not appeal to him, for it meant risking the extinguishment of his torch; also he could not very well carry torch, bow, and arrows in the one hand while swimming with the other, and he was by this time much too wise to go poking about in strange places without his weapons. No, that would certainly not do; rather than be guilty of so foolish an act as to discard his weapons he would leave that hole on the other side unexplored. But that alternative, too, was distinctly distasteful to the young Englishman, and he once more raised his torch and carefully examined the walls of the cavern, to see if he could find a way of getting to the other side without being obliged to swim across. And now that he was definitely looking for it he saw that there was a something in the nature of a narrow ledge running along the left side of the chamber, at a height of about six inches above the water’s surface, by means of which, and aided by the roughnesses of the cavern wall, he believed he could scramble over to the other side. He at once determined to make the attempt, noticing at the same time, without attaching any particular significance to the fact, that the agitation of the surface of the pond had so far subsided that there was now but the merest suggestion of a ripple on it.

When Stukely reached the ledge by means of which he proposed to essay the passage to the far side of the cavern he found, to his satisfaction, that it was a quite well-defined projection running the entire length of the wall, and

apparently nowhere less than four inches wide, while there were places where it widened out to nearly a foot in breadth, also the surface of the wall was so rough that the irregularities would afford him excellent grip for one hand. Therefore returning to its quiver the arrow which he had thus far been holding in readiness for a sudden emergency, and slinging his bow over his shoulder, so that he might have one hand quite free to cling by, the young man set his foot upon the ledge and began to make his way cautiously across.

He had accomplished rather more than half the distance across when he suddenly felt the water surge up over his feet and ankles, and, upon looking down, saw, to his consternation, that it was once more violently agitated, the swirling eddies upon its surface plainly indicating the presence of some powerful disturbing influence at the bottom of the pool. Then, as Phil continued to gaze, that influence revealed itself as a shapeless fawn-coloured something imperfectly seen through the disturbed water, and the next moment an enormous head emerged, a pair of monstrous jaws gaped widely, and the air of the cavern at once became again surcharged with the disgusting effluvium which Phil had once before observed. As Stukely gazed, fascinated, at the terrifying object which had thus suddenly appeared he became aware that the creature was dazzled and to some extent discomfited by the light of the torch, for the lids of its immense goggle eyes blinked incessantly as it returned Phil’s gaze, taking immediate advantage of which the young man thrust his torch toward it as far as he could reach, with the immediate result that the great head again sank out of sight. Only for a few brief seconds, however; but the young Englishman availed himself of those few seconds to scramble along the remainder of the ledge and reach the point for which he was aiming, and which now proved to be a sloping surface of rock about twenty feet broad, leading up from the water to the circular opening which Stukely had been so anxious to explore.