So absorbed had they become in each other that neither noticed the slinking figure which stole out of the glade at the sound of their approach, or the charcoal of a hastily-extinguished fire swirling in the eddies of the little pool. And mercifully they did not know, as they stood there in close-held rapture, drinking with clinging lips the Lethe of all things save love, that twenty feet away, from the vantage of a dense clematis tangle veiling a clump of dwarf box-elder, a pair of evil eyes burned above a snarling mouth, as a grimy hand drew cautiously back the firing bolt of a Mauser.
Ballard, riding ahead of his posse, reined in his horse sharply at the head of the trail leading down to the stream as a shot crackled viciously in the depths of the cañon below. There was no mistaking that crisp, whip-like report of a small-calibered, high-pressure rifle cartridge, and he wondered much that it was not accompanied by the whine of the long metal-cased bullet about his ears. For the last twenty-four hours had he been in momentary expectation of that sinister song, of a possible succeeding agony of blindness, for he realized that he was now in the hands of the gods, and more or less at the mercy of the desperate man whom he had been relentlessly pursuing for the last three days, a man who would just as relentlessly kill him if the opportunity offered, a man who knew every inch of these mountain fastnesses in which he had taken refuge in his last extremity.
But despite all hazards of ambush he had kept doggedly on the trail, and now he was within reach of his quarry. Hurriedly directing two of his best mounted followers to cover the cañon's mouth below, and the remaining two to guard the only other possible exit above, he rode at breakneck speed down the precipitous trail, spurred to recklessness by a woman's wailing scream.
Four days before, the Gunnison Express had been boarded at a watering tank, some fifty miles out of the city, by a particularly villainous band of desperadoes who, not content with looting the passengers, mails and express matter, had maliciously aggravated their crime with murder, deliberately shooting down the conductor and express messenger after the robbery had been accomplished. It was an unheard-of brutality, the men being helpless, unarmed and unresisting, and pursuit of the wretches had been so prompt and successful that every member of the gang, save the one now in the cañon before him, was presently decorating a series of telegraph posts on the outskirts of the city, their captors having given them but exceedingly short shrift. And one of them, in an unavailing attempt to enlist the mercy of his grim executioners, had confessed that Matlock was the leader of the gang; but with characteristic cowardice had refrained from personal active participation in the robbery, merely directing their operations from a safe distance as arch plotter. His trail was soon found and had been skillfully followed so far by the expert marshal, whose long experience in trailing cattle on the cow range had made him one of the best trackers in the mountains.