while a part, ceases to be the chief feature of the scene. It is the vivid coloring and remarkable formation of the sides of the canyon that make the chief impression. These change as the sun gives light and shadow, the morning differing from noon and noon from night. It is impossible to reproduce or properly describe the beautiful hues in this wonderful picture. The prevailing tint is a light yellow, almost sulphur color, with veins of white marble and bright red streaked through it. The colors blend admirably, while the cascade in the background seems enclosed in a setting of chocolate-brown rocks, contrasting picturesquely with the brighter foreground. Throughout the grand scene, great rocky columns and pinnacles arise, their brilliant hues maintained to the tops, and the scattered pines clinging to these huge columnar formations give a green tinge to parts of the picture. The _débris_, forming an inclined base about half-way down, is colored as brilliantly as the rocks above, from which it has fallen. In the view over the canyon from Point Lookout, the contracted white streak of the cascade above the spray cloud is but a small part of the background, while the river below is only a narrow green ribbon, edged by these brilliant hues. Some distance farther down the canyon, another outlook at Inspiration Point gives a striking view from an elevation fifteen hundred feet above the river of the gorgeous coloring of the upper canyon. This grand Canyon of the Yellowstone extends, as the river flows, a distance of about twenty-four miles. It is a depression in a volcanic plateau elevated about eight thousand feet above the sea, and gradually declining towards the northern end of the canyon. Above the Upper Fall the river level is almost at the top of the plateau, and the falls and rapids depress the stream bed about thirteen hundred feet. About midway along the canyon, on the western side, is Washburne Mountain, the surface from it declining in both directions, so that there the canyon is deepest, measuring twelve hundred feet. Across the top, the width varies from four hundred to sixteen hundred yards, the angle of slope down to the bottom being fully 45°, and often much steeper, in some cases almost perpendicular where the top width is narrowest. This Grand Canyon is the beautiful beginning, as it were, of the largest river in the world,--the Missouri and the Mississippi. Upon the trail in the southern part of the National Park which goes over from the Firehole River to the West Thumb, and at quite an elevation upon the Continental Divide, there is a quiet little sheet of water, having two small streams flowing from its opposite sides. To the eastward a babbling brook goes down into the West Thumb of the Yellowstone Lake, while to the southwest another small creek flows over the boulders towards Shoshone Lake. This scanty sheet of water, properly named the Two-Ocean Pond, actually feeds both the Atlantic and Pacific Oceans.