The Grand Canyon of the Arkansas is one of the most magnificent gorges in the Rocky Mountains. This river above Pueblo forces its passage through a deep pass known in the narrowest part as the Royal Gorge, where the railway is laid alongside the boiling and rushing stream, with rocky cliffs towering twenty-six hundred feet above the line. It ascends westward, beyond the sources of the Arkansas, crossing the Continental Divide by the Marshall Pass, at ten thousand eight hundred and fifty-eight feet elevation, the route up there showing, in its abrupt and bold curves, great engineering skill. The Pass is always covered with snow, and the descent beyond it is to the mining town of Gunnison. The Gunnison River is followed down through its magnificent gorge, the Black Canyon giving a splendid display for sixteen miles of some of the finest scenery of the Rockies. The river is an alternation of foaming rapids and pleasant reaches, and within the canyon is the lofty rock pinnacle of the Currecanti Needle. The adjacent gorge of the Cimarron, a tributary stream, gives also a splendid display of Rocky Mountain wildness, and below it the river passes through the Lower Gunnison Canyon, bounded by smooth-faced sandstone cliffs, and finally it falls into Grand River, one of the head-streams of the Colorado. The combined magnificence of these canyons and mountains makes the environment of the Colorado mining region one of the most attractive scenic districts in America. The railways have arranged a route of a thousand miles through the mountains, starting from Denver, under the title of "Around the Circle," which crosses and recrosses the Continental Divide, threads the wonderful canyons, surmounts all the famous passes over the tops of the Rocky ranges, and includes the most attractive scenery of the district. WYOMING FOSSILS.