They believed themselves warranted in hoping for the best, so far as Ashman was concerned. He had probably strolled some distance, and must have been warned by the firing of the Professor's Winchester from the front, of the serious danger in which his friends were involved. If all had gone well with the youth up to that time, he ought to be wise enough to get away without an instant's delay. What was feared was, that in his anxiety to help his comrades, he would run into a peril from which he could not extricate himself.

The real hope for the youth was centered on Ziffak. Believing he had gone forth to look after Ashman, they were confident he would speedily get upon his track. If so, he would not permit him to return to the village.

From what the reader has been told, it will be seen that the defenders were not far off in their conjectures.

But, when they came to speculate upon the part that the head chieftain was likely to take, affecting Grimcke and Long, they were all at sea.

It would ever be a source of wonder that he had been transformed from a relentless enemy into the strongest of friends, but they fully realized that such friendship must have its bounds.

Ziffak might not shrink from using very plain speech when talking face to face with his brother, but it was hardly to be supposed that he would raise his arm against his authority. At the time Ziffak made known the probability that the explorers might be compelled to take their departure that evening, he gave no intimation of any purpose of helping them to resist such an order.

Accustomed as he was to lead the warlike Murhapas in battle, he might well hesitate to ask them to turn their weapons against the king, and if he should presume on such treason, all the probabilities were that such weapons would be turned against the head chieftain himself.

CHAPTER XXIX.

ACROSS THE LAKE.

A few minutes after pa.s.sing the bend in the stream, which hid the rock and the sleeping sentinel from sight, Fred Ashman observed that the smooth current broadened into a lake, forming the extraordinary sheet of water of which he had heard such strange accounts.

He held the paddle suspended, and looked around.

The surface was as calm as the face of a mirror, and in the strong moonlight, as he looked down he could see that it was of crystalline clearness--so much so, indeed, that a boat or any floating object looked as if suspended in mid-air.

It expanded right and left and in front, until he could barely discern the dim outlines of trees and rocks that shut it in. It was probably two or three square miles in extent, and to the westward the sh.o.r.e appeared to be composed of enormous boulders and ma.s.ses of rocks.

Directly ahead, was a crag more ma.s.sive than the rest, towering a hundred feet above the lake, with a breadth fully one half as great.

It resembled some gigantic sentinel, keeping ward and watch over the strange region unknown to few if any white man.

Ashman turned to his companion with the question, what course he should take, and, without speaking, she pointed to the rock which she saw had attracted his attention.

Very slight effort was required to propel the delicate craft, which seemed to become sentient, and to move forward in obedience to the wishes of its occupants. He barely dipped the blade into the water, when it skimmed forward like a swallow. After a number of strokes he ceased and fixed his eyes on the landmark by which he was proceeding.

A singular emotion held him speechless for the time. The vast ma.s.s of stone appeared to be slowly rising from the bosom of the lake, and, instead of remaining motionless, was advancing to meet the tiny canoe and its awed occupants. One moment, it was like some vast ogre, stealing silently about to crush them beneath the clear waters, and then it became a friendly giant, reaching out its hand to lead them forward.

But for the distant sounds of firing at the Murhapa village, Fred Ashman would have felt that it was all a vision of sleep, from which he must soon awake to the realities of life.

But that horrible, grinding discord continually creeping into their ears told too plainly the dreadful scenes at comparatively a short distance. Even in his exalted mental state, Ashman began to ask himself what was to be the end of the strange venture upon which he had started. A disquieting misgiving arose, that perhaps he had not done the wisest thing in leaving his imperilled friends.

But he reflected that he had only obeyed the orders of Ziffak, who indeed would not have permitted his wishes to be disregarded, for who should know the wisest course so well as he? Besides, his own reason told him that if the Professor and his companion were attacked in the cabin, it was impossible for him to raise a finger in their behalf.

And so he dismissed that phase of the marvellous business from his mind and faced the present situation.

He had fled with Ariel from her father, King Haffgo. Instead of turning to the northward down the Xingu, they had gone further up the stream and directly away from the right course out of the perilous country.

But while, in one sense, this might be looked upon as the height of recklessness, he saw it was unavoidable. Had they turned down the Xingu, there would have been no escaping their foes, while the enchanted lake and its surroundings must afford secure shelter for a time.

But for how long?

That was the question which obtruded itself, even while filled with the delightful thrill of his new love, and when _en rapport_ with his marvellous surroundings.

The intimate knowledge which Ariel possessed of the region would guide them to some spot where they could reasonably hope to be safe from pursuit, unless such pursuit was led by her enraged parent.

Ashman was still scrutinizing the great ma.s.s of rock, steadily a.s.suming more definite shape in the moonlight as the intervening distance decreased, when he was surprised that he had not noticed the mountainous elevation behind it. The immense rock seemed but the beginning of others rising beyond to the height of a thousand feet, while they broadened to the right and left until they stretched over an extent of several miles.

It seemed to him that these const.i.tuted a spur of the Geral range, which extend in a northwesterly direction between the Guapore River (forming a part of the eastern boundary of Bolivia) and the headwaters of the Tapajos and Xingu. If so, their extent was continuous for a hundred miles.

Ashman had ceased paddling, though, under the faint momentum remaining, the canoe continued slowly moving over the lake and gradually drawing near the rock. He did not break the silence, but asked himself what could be the reason of Ariel's direction for him to paddle toward the rock. He supposed there was some place of concealment which she had in mind, though he discerned nothing of that nature.

"We cannot stay there forever," was the practical thought in the mind of the lover, who felt the next moment as though he would be happy to dwell forever anywhere with her.

"After we have staid here until pursuit is given up--_if it ever will be_--then we must leave the country. I will take her to my home in North America, where I shall love and cherish her and become the envied of all men."

"We are approaching the rock," he said, addressing her; "what next, dearest Ariel."

"Paddle right on," was the astonishing reply.

He looked at her with a questioning smile. Could she be in earnest?

"Right on," she repeated, reading his thoughts aright.

"Very well; the slave obeys his mistress," he replied, giving the paddle another dip in the water.

Gazing ahead, he instantly discovered the cause of her reply. A tunnel opened into the rock, seemingly near the centre. It was perhaps ten feet in height and with a width slightly greater. Could it be she meant he should enter that black forbidding pa.s.sage? He asked the question and she replied that such was her wish.

He could not decline to take her whither she desired to go. Gently swaying the blade, he sent the boat within the dark opening, which appeared to distend its jaws to swallow the canoe and them from the world to which they had bidden good-bye.

Ashman was beginning to ask himself how he was to continue the advance in the darkness, which must become impenetrable as they pa.s.sed beyond the limit of the moonlight, when he perceived the water into which he dipped the paddle.

Not only that, but it grew more distinct as he progressed, until once more the form of his beloved came out to view, as she sat near him in the canoe.

Wondering what it all meant, he gazed ahead. The surface of the water grew plainer, as his eye ranged along the tunnel, until, only a short distance away, the view was clearer than on the lake itself, beneath the full moon.

What was the explanation of this wonderful sea of illumination into which he was guiding the canoe?

CHAPTER x.x.x.

A GUESS.

Standing in the door of the building, his figure so wrapped in gloom that it was invisible to the fierce Murhapas, Professor Grimcke cautiously peered out upon the mult.i.tude that were clamorously seeking the death of himself and comrade.

The horde seemed to be everywhere. They were glaring over the river bank, behind which they could find secure shelter by merely dropping their heads; they were crouching at the corners of the adjacent houses, the king's residence affording screen to fully a score. Not yet fully recovered from their panic, they appeared to be awaiting the leadership of some strong man who held the fire-arms of the explorers in less dread than they.

A form rose upright along the Xingu, at the upper portion of the line of savages. In the full moonlight he was as clearly revealed as if at mid-day.