At sunset hour the forest was still, lonely, sweet with tang of fir and spruce, blazing in gold and red and green; and the man who glided on under the great trees seemed to blend with the colors and, disappearing, to have become a part of the wild woodland. Old Baldy, highest of the White Mountains, stood up round and bare, rimmed bright gold in the last glow of the setting sun. Then, as the fire dropped behind the domed peak, a change, a cold and darkening blight, passed down the black spear-pointed slopes over all that mountain world. It was a wild, richly timbered, and abundantly watered region of dark forests and grassy parks, ten thousand feet above sea-level, isolated on all sides by the southern Arizona desert-the virgin home of elk and deer, of bear and lion, of wolf and fox, and the birthplace as well as the hiding-place of the fierce Apache. September in that latitude was marked by the sudden cool night breeze following shortly after sundown. Twilight appeared to come on its wings, as did faint sounds, not distinguishable before in the stillness. Milt Dale, man of the forest, halted at the edge of a timbered ridge, to listen and to watch. Beneath him lay a narrow valley, open and grassy, from which rose a faint murmur of running water. Its music was pierced by the wild staccato yelp of a hunting coyote. From overhead in the giant fir came a twittering and rustling of grouse settling for the night; and from across the valley drifted the last low calls of wild turkeys going to roost. To Dale's keen ear these sounds were all they should have been, betokening an unchanged serenity of forestland. He was glad, for he had expected to hear the clipclop of white men's horses-which to hear up in those fastnesses was hateful to him. He and the Indian were friends. That fierce foe had no enmity toward the lone hunter. But there hid somewhere in the forest a gang of bad men, sheep-thieves, whom Dale did not want to meet. As he started out upon the slope, a sudden flaring of the afterglow of sunset flooded down from Old Baldy, filling the valley with lights and shadows, yellow and blue, like the radiance of the sky. The pools in the curves of the brook shone darkly bright.