The Yellowstone River, one of the headwaters of the Missouri, rises in the National Park, and its fertile valley is among the leading pasturages of Montana. Cattle and sheep abound, and the cowboys are universal, galloping about on energetic little bronchos, with lariats hanging from the saddle. The Big Horn River flows in, and an extensive region to the southward is the Crow Indian reservation, about three thousand living there. It was here, near Fort Custer, at a point forty-five miles south of the railroad, that the terrible massacre took place in June, 1876, by which General Custer and his command of over two hundred and fifty men were annihilated by the Sioux. There is now a national cemetery at the place. We gradually enter the mountain ranges which are the outposts of the Rockies, and passing between the Yellowstone range and the Belt Mountains, reach Livingston, a town of several thousand people, and a great centre for hunting and fishing, at the entrance to the Yellowstone National Park. From here a branch railway turns southward, ascending the valley of the Yellowstone, going through its first canyon, known as the "Gate of the Mountain," an impressive rocky gorge, and ascending a steep grade, so that the floor of the valley rises within the Park to an elevation of over six thousand feet above the sea. A second canyon is passed, and on its western side is a huge peak whose upheaved red rocks have named it the Cinnabar Mountain. These red rocks are in strata streaked down its sides with intervening granite and limestone. One of these, the Devil's Slide, is conspicuous, its quartzite walls rising high above the lower strata and making a veritable slide of great proportions down the mountain. The railroad ends at Cinnabar, and stages cover the remaining distance up the Yellowstone to its confluence with Gardiner River at the Park entrance, and thence to the Mammoth Hot Springs within the Park, the tourist headquarters. THE AMERICAN WONDERLAND.