and with a caution which steadily increased as they advanced until at length they went ahead only when the crescent moon was obscured by drifting clouds. Ahead loomed the two-story gambling-hall, its windowless rear wall of bleached lumber leaden in the faint light. An occasional finger of fire stabbed from its south wall to be answered by fainter stabs from the open, the reports flat and echoless. A distant voice sang a fragment of song and a softened laugh replied to a ribald jest. A horse neighed and out of the north came quaveringly the faint howl of a moon-worshiping coyote.
The three friends, face down on the sand, now each behind a squat bush, wriggled forward silently but swiftly, and gained new and nearer cover. Again a cloud passed before the moon and again they wriggled forward, their eyes fixed on the top of the roof ahead, two of them heading for the same bush and the other for a shallow gully. The pair met and settled themselves to their satisfaction, heads close together as they consulted about the proper setting of the rear sights. One of them knelt, the rifle at his shoulder reaching out over the top of the bush, his companion sitting cross-legged at his side, a pile of dull brass cartridges in the sombrero on the ground between his knees to keep the grease on the bullets free from sand.
The kneeling man bent his head and let his cheek press against the stock of the heavy weapon, whispered a single word and waited. Twice there came the squeak of a frightened rat from his companion and instantly from the right came an answering squeak as the figure of a man leaped up from the gully and sprinted for the lead-colored
