followed closely along the river bank, aiming for the ford, and almost before he realized it Keith was himself at the water's edge where the trail abruptly ended, staring vaguely across toward the opposite shore. Even as he stood there, realizing the futility of further pursuit amid the maze of sand dunes opposite, the sharp reports of two rifles reached him, spurts of smoke rose from the farther bank, and a bullet chugged into the ground at his feet, while another sang shrilly overhead.     

       These shots, although neither came sufficiently near to be alarming, served to send Keith to cover. Cool-headed and alert now, his first mad rage dissipated, he scanned the opposite bank cautiously, but could nowhere discover any evidence of life. Little by little he comprehended the situation, and decided upon his own action. The fugitives were aware of his presence, and would prevent his crossing the stream, yet they were not at all liable to return to this side and thus reveal their identity. To attempt any further advance would be madness, but he felt perfectly secure from molestation so long as he remained quietly on the north shore. Those shots were merely a warning to keep back; the very fact that the men firing kept concealed was proof positive that they simply wished to be left alone. They were not afraid of what he knew now, only desirous of not being seen. Confident as to this, he retreated openly, without making the slightest effort to conceal his movements, until he had regained the scene of murder. In evidence of the truth of his theory no further shots were fired, and although he watched that opposite sand bank carefully, not the slightest movement revealed the presence of others. That every motion he made was being observed by keen eyes he had no doubt, but this knowledge did not disconcert him, now that he felt convinced fear of revealment would keep his watchers at a safe distance. Whoever they might be they were evidently more anxious to escape discovery than he was fearful of attack, and possessed no desire to take his life, unless it became necessary to prevent recognition. They still had every reason to believe their attack on the wagons would be credited to hostile Indians, and would consider it far safer to remain concealed, and thus harbor this supposition. They could not suspect that Keith had already stumbled upon the truth, and was determined to verify it.     

       Secure in this conception of the situation, yet still keeping a wary eye     

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