From Lake Tabor Miss Bird returned to Truckee, and started on another excursion which brought her within view of the Great Salt Lake and the Mormon town of Ogden, and thence to Cheyenne, in the State of Wyoming. Having thus crossed the mountain-range of the Sierras and descended into the plains, she entered upon the region of the "boundless prairies--great stretches of verdure, generally level, but elsewhere rolling in long undulations, like the waves of a sea which had fallen asleep." Their monotony is broken by large villages of the so-called prairie dogs, the Wishton-Wish, a kind of marmot, which owes its misleading name to its short, sharp bark. The villages are composed of raised circular orifices, about eighteen inches in diameter, from which a number of inclined passages slope downwards for five or six feet. "Hundreds of these burrows are placed together. On nearly every rim a small furry, reddish-buff beast sat on his hind legs, looking, so far as head went, much like a young seal. These creatures were acting as sentinels, and sunning themselves. As we passed each gave a warning yelp, shook its tail, and, with a ludicrous flourish of his hind legs, dived into its hole. The appearance of hundreds of these creatures, each eighteen inches long, sitting like dogs begging, with their paws down and all turned sunwards, is most grotesque." At Greeley Miss Bird entered Colorado, which she describes, as we have seen, in such a manner as to suggest that it rivals Dr. Richardson's imaginary "Hygeia" in all essential particulars. From Greeley she hastened to Fort Collins, with the grand masses of the Rocky Mountains facing her as she advanced. Still across the boundless sea-like prairie struck the indefatigable traveller, until she came to a sort of tripartite valley, with a majestic crooked canyon, 2,000 feet deep, and watered by a roaring stream, where in a rude log-cabin she abode for several days. Having obtained a horse she rode across the highlands, and striking up the St. Vrain Canyon ascended to Esteo Park, 7,500 feet above the sea-level. To understand the majesty of the Rocky Mountains, the reader must think of them as a mass of summits, frequently 200 and 250 miles wide, stretching, with scarcely any interruption of continuity, almost from the Arctic Circle to the Straits of Magellan. At the point ascended by Miss Bird their scenery was of the grandest description--wonderful ascents, wild fantastic views, cool and bowery shades, romantic glens echoing melodiously with the fall of waters. But it is only fair that Miss Bird should be heard on her own account:--