Gabula looked down, surprise and wonder reflected by his wide eyes and parted lips.
"But, Bwana, even if a human being could find a way down these steep cliffs, where there is no place for either hand or foot, he would surely be killed the moment he reached the bottom, for this indeed must be the Land of The Lost Tribe where the spirits of the dead live in the heart of the Wiramwazi."
"You do not need to come with me, Gabula," said von Harben. "Go back to your people."
"How are you going to get down there?" demanded the Negro.
"I do not know just how, or where, or when. Now I am going to descend as far along this fissure as I can go. Perhaps I shall find my way down here, perhaps not."
"But suppose there is no foothold beyond the fissure?" asked Gabula.
"I shall have to find footing."
Gabula shook his head. "And if you reach the bottom, Bwana, and you are right about the spirits and there are none or they do not kill you, how will you get out again?"
Von Harben shrugged his shoulders and smiled. Then he extended his hand. "Goodby, Gabula," he said. "You are a brave man."
Gabula did not take the offered hand of his master. "I am going with you," he said, simply.
"Even though you realize that should we reach the bottom alive we may never be able to return?"
"Yes."
"I cannot understand you, Gabula. You are afraid and I know that you wish to return to the village of your people. Then why do you insist on coming with me when I give you leave to return home?"
"I have sworn to serve you, Bwana, and I am a Batoro," replied Gabula.
"And I can only thank the Lord that you are a Batoro," said von Harben, "for the Lord knows that I shall need help before I reach the bottom of this canyon, and we must reach it, Gabula, unless we are content to die by starvation."
"I have brought food," said Gabula. "I knew that you might be hungry and I brought some of the food that you like," and, unrolling the small pack that he carried, he displayed several bars of chocolate and a few packages of concentrated food that von Harben had included among his supplies in the event of an emergency.
To the famished von Harben, the food was like manna to the Israelites, and he lost no time in taking advantage of Gabula's thoughtfulness. The sharp edge of his hunger removed, von Harben experienced a feeling of renewed strength and hopefulness, and it was with a light heart and a buoyant optimism that he commenced the descent into the canyon.
Gabula's ancestry, stretching back through countless generations of jungle-dwelling people, left him appalled as he contemplated the frightful abyss into which his master was leading him, but so deeply had he involved himself by his protestations of loyalty and tribal pride that he followed von Harben with no outward show of the real terror that was consuming him.
The descent through the fissure was less difficult than it had appeared from above. The tumbled rocks that had partially filled it gave more than sufficient footing and in only a few places was assistance required, and it was at these times that von Harben realized how fortunate for him had been Gabula's return.
When at last they reached the bottom of the cleft they found themselves, at its outer opening, flush with the face of the cliff and several hundred feet below the rim. This was the point beyond which von Harben had been unable to see and which he had been approaching with deep anxiety, since there was every likelihood that the conditions here might put a period to their further descent along this route.
Creeping over the loose rubble in the bottom of the fissure to its outer edge, von Harben discovered a sheer drop of a hundred feet to the level of the next terrace and his heart sank. To return the way they had come was, he feared, a feat beyond their strength and ingenuity, for there had been places down which one had lowered the other only with the greatest difficulty, which would be practically unscalable on the return journey.
It being impossible to ascend and as starvation surely faced them where they were, there was but one alternative. Von Harben lay upon his belly, his eyes at the outer edge of the fissure, and, instructing Gabula to hold tightly to his ankles, he wormed himself forward until he could scan the entire face of the cliff below him to the level of the next terrace.
A few feet from the level on which he lay he saw that the fissure lay open again to the base of the cliff, its stoppage at the point where they were having been caused by a large fragment of rock that had wedged securely between the sides of the fissure, entirely choking it at this point.
The fissure, which had narrowed considerably since they had entered it at the summit, was not more than two or three feet wide directly beneath the rock on which he lay and extended with little variation at this width the remaining hundred feet to the comparatively level ground below.
If he and Gabula could but get into this crevice he knew that they could easily brace themselves against its sides in such a way as to descend safely the remaining distance, but how with the means at hand were they to climb over the edge of the rock that blocked the fissure and crawl back into the fissure again several feet farther down?
Von Harben lowered his crude alpenstock over the edge of the rock fragment. When he extended his arms at full length the tip of the rod fell considerably below the bottom of the rock on which he lay. A man hanging at the end of the alpenstock might conceivably swing into the fissure, but h would necessitate a feat of acrobatics far beyond the powers of either himself or Gabula.
A rope would have solved their problem, but they had no rope. With a sigh, von Harben drew back when his examination of the fissure convinced him that he must find another way, but he was totally at a loss to imagine in what direction to look for a solution.
Gabula crouched back in the fissure, terrified by the anticipation of what von Harben's attempted exploration had suggested. The very thought of even looking out over the edge of that rock beyond the face of the cliff left Gabula cold and half paralyzed, while the thought that he might have to follow von Harben bodily over the edge threw the Negro into a fit of trembling; yet had von Harben gone over the edge Gabula would have followed him.
The white man sat for a long time buried in thought. Time and again his eyes examined every detail of the formation of the fissure within the range of his vision. Again and again they returned to the huge fragment upon which they sat, which was securely wedged between the fissure's sides. With this out of the way he felt that they could make unimpeded progress to the next terrace, but he knew that nothing short of a charge of dynamite could budge the heavy granite slab. Directly behind it were loose fragments of various sizes, and as his eyes returned to them once again he was struck with the possibility that they suggested.
"Come, Gabula," he said. "Help me throw out some of these rocks. This seems to be our only possible hope of escaping from the trap that I have got us into."
"Yes, Bwana," replied Gabula, and fell to work beside von Harben, though he could not understand why they should be picking up these stones, some of which were very heavy, and pushing them out over the edge of the flat fragment that clogged the fissure.
He heard them crash heavily where they struck the rocks below and this interested and fascinated him to such an extent that he worked feverishly to loosen the larger blocks of stone for the added pleasure he derived from hearing the loud noise that they made when they struck.
"It begins to look," said von Harben, after a few minutes, "as though we may be going to succeed, unless by removing these rocks here we cause some of those above to slide down and thus loosen the whole mass above us—in which event, Gabula, the mystery of The Lost Tribe will cease to interest us longer."
"Yes, Bwana," said Gabula, and lifting an unusually large rock he started to roll it toward the edge of the fissure. "Look! Look, Bwana!" he exclaimed, pointing at the place where the rock had lain.