of safety, and confident their cowardly deed would be charged to Indian raiders, had made no particular effort at concealment, but had ridden away at a gallop, their horses' hoofs digging deeply into the soft turf. On this retreat they had 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 about to guard against any treachery, the plainsman, discovering a spade in the nearest wagon, hastily dug a hole in the sand, wrapped the dead bodies in blankets, and deposited them therein, piling above the mound the charred remains of boxes as some slight protection against prowling wolves. He searched the clothing of the men, but found little to reward the effort, a few letters which were slipped into his pockets to be read later, some ordinary trinkets hardly worth preserving except that they might assist in identifying the victims, and, about the neck of the elder man, a rather peculiar locket, containing a portrait painted on ivory. Keith was a long time opening this, the spring being very ingeniously concealed, but upon finally succeeding, he looked upon the features of a woman of middle age, a strong mature face of marked refinement, exceedingly attractive still, with smiling dark eyes, and a perfect wealth of reddish brown hair. He held the locket open in his hands for several minutes, wondering who she could be, and what possible connection she could have held with the dead. Something about that face smiling up into his own held peculiar fascination for him, gripping him with a strange feeling of familiarity, touching some dim memory which failed to respond. Surely he had never seen the original, for she was not one to be easily forgotten, and yet eyes, hair, expression, combined to remind him of some one whom he had seen but could not bring definitely to mind. There were no names on the locket, no marks of identification of any kind, yet realizing the sacredness of it, Keith slipped the fragile gold chain about his neck, and securely hid the trinket beneath his shirt.
It was noon by this time, the sun high overhead, and his horse, with dangling rein, still nibbling daintily at the short grass. There was no reason for his lingering longer. He swept his gaze the length and breadth of the desolate valley, and across the river over the sand hills. All alike appeared deserted, not a moving thing being visible between the bluffs and the stream. Still he had the unpleasant feeling of being watched, and it made him restless and eager to be away. The earlier gust of anger, the spirit of revenge, had left him, but it had merely changed into a dogged resolution to discover the perpetrators of this outrage and bring them to justice for the crime. The face in the locket seemed to ask it of him, and his nature urged response. But he could hope to accomplish nothing more here, and the plainsman swung himself into the saddle. He turned his horse's head eastward, and rode away. From the deeply rutted trail he looked back to where the fire still smoked in the midst of that desolate silence.
Chapter III. An Arrest
The Santa Fé trail was far too exposed to be safely travelled alone and in broad daylight, but Keith considered it better to put sufficient space between himself and those whom he felt confident were still watching his movements from across the river. How much they might already suspicion his discoveries he possessed no means of knowing, yet, conscious of their own guilt, they might easily feel safer if he were also put out of the way. He had no anticipation of open attack, but must guard against treachery. As he rode, his eyes never left those far-away sand dunes, although he perceived no movement, no black dot even which he could conceive to be a possible enemy. Now that he possessed ample time for thought, the situation became more puzzling. This tragedy which he had accidentally stumbled upon must have had a cause other than blind chance. It was the culmination of a plot, with some reason behind more important than ordinary robbery. Apparently the wagons contained nothing of value, merely the clothing, provisions, and ordinary utensils of an emigrant party. Nor had the victims' pockets been carefully searched. Only the mules had been taken by the raiders, and they would be small booty for such a crime.
The trail, continually skirting the high bluff and bearing farther away from the river, turned sharply into a narrow ravine. There was a considerable break in the rocky barrier here, leading back for perhaps a hundred yards, and the plainsman turned his horse that way, dismounting when out of sight among the bowlders. He could rest here until night with little danger of discovery. He lay down on the rocks, pillowing his head on the saddle, but his brain was too active to permit sleeping. Finally he drew the letters from out his pocket, and began examining them. They yielded very little information, those taken from the older man having no envelopes to show to whom they had been addressed. The single document found in the pocket of the other was a memorandum of account at the Pioneer Store at Topeka, charged to John Sibley, and marked paid. This then must have been the younger man's name, as the letters to the other began occasionally “Dear Will.” They were missives such as a wife might write to a husband long absent, yet upon a mission of deep interest to both. Keith could not fully determine what this mission might be, as the persons evidently understood each other so thoroughly that mere allusion took the place of detail. Twice the name Phyllis was mentioned, and once a “Fred” was also referred to, but in neither instance clearly enough to reveal the relationship, although the latter appeared to be pleaded for. Certain references caused the belief that these letters had been mailed from some small Missouri town, but no name was mentioned. They were invariably signed “Mary.” The only other paper Keith discovered was a brief itinerary of the Santa Fé trail extending as far west as the Raton Mountains, giving the usual camping spots and places where water was accessible. He slipped the papers back into his pocket with a distinct feeling of disappointment, and lay back staring up at the little strip of blue sky. The silence was profound, even his horse standing motionless, and finally he fell asleep.
The sun had disappeared, and even the gray of twilight was fading out of the sky, when Keith returned again to consciousness, aroused by his horse rolling on the soft turf. He awoke thoroughly refreshed, and eager to get away on his long night's ride. A cold lunch, hastily eaten, for a fire would have been dangerous, and he saddled up and was off, trotting out of the narrow ravine and into the broad trail, which
