Waring picketed his horse in a dim angle of the Agua Fria Canon, spread his saddle-blanket to dry in the afternoon sun, and, climbing to a narrow ledge, surveyed the canon from end to end with a pair of high-power glasses. He knew the men he sought would ride south. He was reasonably certain that they would not ride through the canon in daylight. The natural trail through the Agua Fria was along the western wall; a trail that he had avoided, working his toilsome way down the eastern side through a labyrinth of brush and rock that had concealed him from view. A few hundred yards below his hasty camp a sandy arroyo crossed the canon's mouth."