A youth in the situation of Fred Greenwood cannot reason clearly, even though he be right in his main conclusions. He had settled into the belief that Motoza, the Sioux, had determined to subject him to a lingering death through starvation; and yet if it were he—as undoubtedly it was—who rolled the boulder into the canyon, it indicated a wish to put the most sudden end possible to his existence.  
It would be painful to attempt to describe the experience of the lad in the cavern at the side of the canyon. As is often the case, his hunger diminished and was succeeded by a dull indifference, in which the suffering of the mind outweighed that of the body. The dreadful day at last drew to an end, and his situation and condition were much the same as earlier in the forenoon. He had not seen a living person, and had given over all hope of another visit from his merciless enemy.
 
"He means that I shall perish for want of food, and there is no help for it."
 
But with the coming of darkness the energy of the boy's nature asserted itself. It was impossible now for the Sioux or his allies to maintain a watch upon the mouth of the cavern, where the lad was observed the moment he showed himself, and Fred determined that as soon as it was fairly dark he would make an attempt that should be crowned with success or that would end his sufferings and wretchedness.
 
His plan was to let himself down from the ledge to the top of the nearest rock, and then try to reach the break in the canyon as he had ascended it under the guidance of his captor. It was not to be supposed that the vigilant Motoza would leave the way open for him, though his actions pointed to the belief that it was utterly impossible for the prisoner to escape by that means.
 
Nor in truth was it possible, for in the impenetrable gloom he was certain to miss his foothold sooner or later and be flung into the torrent, with no possibility of the good fortune that attended Jack Dudley, who had a much less distance to traverse.
 
It was yet early in the evening when Fred came once more and for the last time to the front of the cavern. With that attention to trifling matters which a person sometimes shows in the most trying crises he wound up his watch, examined his clothing to see that everything was right, adjusted his hat so that it was not likely to be displaced, and looked out in the gloom. All that he could see was when he gazed upward and observed a few stars twinkling in the thin streak of sky.
 
"Two things are certain," he mused: "that Indian does not think it possible for me to make my way out of the canyon; and, if I should succeed, he will be on the watch for me and shoot or try to force me to return. He shall never get me back here, for I will take the risk of drowning, and then——"
 
A thought flashed through him like an inspiration and fairly took away his breath.
 
Why not climb the side of the canyon?
 
He was so overcome by the question, which seemed born of heaven, that he stood dazed and bewildered. Then he became cool again and asked:
 
"Is it possible?"
 
He recalled that Hank Hazletine had told him he had done it during the daytime, and it must have been somewhere in this neighborhood. The task would seem easy if the sun were shining, but if it were shining Fred Greenwood would not have been permitted to make the attempt.
 
He was convinced of another thing: the depth of the canyon had been repeatedly referred to as being a thousand feet, but there were places where it was less than half that extent, and he remembered a depression in the earth, almost directly overhead, which must have lessened the prodigious height found at other points.
 
Nevertheless, a climb of several hundred feet up the perpendicular side of a canyon or mountain wall is severe work to the most powerful and best trained man, and its formidable nature was proved by the fact that some of the cowmen would not try it by daylight.
 
Nothing could be clearer than that Motoza had not hesitated to leave his prisoner alone in the cavern for the reason that he was certain he could not effect his escape therefrom. The last means the youth would think of employing was that of climbing the side; therefore, as Fred reasoned, that was the very means to adopt, and the only one that could possibly succeed.
 
"I'll try it!" was his conclusion, after a few minutes' thought.
 
Before setting out on the unparalleled task he fervently asked the help of the only One who could extricate him from his peril. Then he summoned his strength and courage to the tremendous work.
 
His dread now was that Motoza would put in an appearance before he was clear of the mouth of the cavern. Had the lad thought of the daring scheme earlier in the day he would have studied the stupendous stairs upon which all his hopes now rested, but it was too late to think of that.
 
Reaching upward, he grasped one of the projecting points of rock and drew himself clear of the opening in front of the cavern. Naturally muscular and active, with all his nerves in superb control, the effort was trifling. Within less time than would be supposed he had climbed fully fifty feet without meeting with any difficulty. Then the first thrill of alarm shot through him as one foot slipped and he narrowly missed falling.
 
He found a good place to rest, and immediately adopted a sensible precaution. Removing both shoes, he tied the strings together and slung them over his shoulder, with the fastening under his chin. This would make it rough for his stockinged feet, but it was worth it all. He was not discommoded by rifle or pistol, and could not have been better prepared for climbing.
 
He felt as yet no fatigue, and resumed his work as soon as he was ready. If he continued to find projections such as he had found thus far, there was no reason why he should not reach the level ground above in safety. As an evidence of how fate sometimes plays fast and loose with us, it is certain that Hank Hazletine entered the cavern while his young friend was climbing the wall overhead, without either dreaming of the actual situation.
 
Fred Greenwood, at the beginning of his climb for liberty, was subjected to a peculiar peril. He had rested but a moment, when he was seized with an extraordinary "panicky" feeling. He was sure that Motoza was standing on the ledge below, peering upward in the gloom, and holding his rifle ready to fire at him on the instant he could make his aim certain.
 
Like all such emotions, it was opposed to common sense. According to his belief it was out of the power of the Sioux to obtain the most shadowy glimpse of him, and the youth ought to have felt as secure against being picked off as if in his home, hundreds of miles away; but the feeling for a time was uncontrollable, and, yielding to it, he began frantically climbing, never abating his efforts until he had gone fully fifty feet higher. By that time he was all a-tremble, and so weak that he was forced to pause for rest. Thus far he had been extremely fortunate in meeting with no difficulty, the projections affording abundant support for hands and feet. Moreover, he had again attained a ledge where he was able to sustain himself with comparative ease.
 
He paused, panting, trembling and exhausted. Thrusting out his head as far as was safe, he looked downward. Nothing but impenetrable gloom met his eye. He could hear the torrent rushing against the rocks and boulders in its path, and flinging itself against the walls of the canyon, but he could distinguish nothing, and his strong sense now came to his rescue.
 
"If he is down there he cannot see me; he will not dream I have started to climb the wall, and therefore will not follow. If he does, he must appear below me, and I will kick him loose the minute I see him. How foolish to be afraid!"
 
In a few minutes his nerves became calmer, but he began to realize the nature of the terrifying task before him. There was no thought of retreat on his part, and he was determined to keep on, so long as the work was possible.
 
His feet were paining him, and were certain to pain him a good deal more before he reached the top; but healthy, rugged youth has elastic muscles, and in a short time Fred was ready to resume his work. His panic was gone, and he exerted himself with the deliberate care which he should have shown from the first.
 
As nearly as he could judge he had climbed some twenty paces, when he was startled, upon extending his hand upward, to encounter only the smooth face of the wall. Hitherto there had been more projections than he required, but now the steps appeared to vanish, leaving him without any support.
 
Could it be he would have to abandon his effort after making so fine a start? Must he pick his way down the side of the canyon, again, to the cavern, and there meekly resume the torture of waiting for death from starvation? Failure was too terrible to be thought of, and he resumed his searching for the indispensable support.
 
Certainly there was nothing directly above him that would serve, and he passed his right hand to one side. Ah! he caught the sharp edge, after groping for a few seconds. Leaning over, he reached out as far as possible and found the projection extended indefinitely.
 
"It will do!" he muttered, with a thrill, and, without pausing to reflect upon the fearful ris............