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Show x PREFACE. It is expected that the results of these labors will, as soon as practicable, be published by the General Government, in a series of volumes, and such publication commences with the present, which, in Part First, gives a history of the original exploration through a region practically unknown prior to the time it was made. It has not been thought best to give a history of all our travels, but only those portions which were original explorations. Accompanying the volume will be found a map of the " Green Eiver from the Union Pacific Railroad to the mouth of the White Eiver," including the eastern portion of the Uinta Mountains, and a " Profile of the Green Eiver and Colorado Eiver of the West, from the crossing of the Union Pacific Eailroad to the mouth of the Colorado, compared with the profile of the Ohio and Mississippi Eivers from Pittsburgh to Vicksburgh." It has been prepared from barometric data collected at different times during the exploration and survey. That portion below the mouth of the Eio Virgin has been taken from Lieutenant Ives's u Eeport upon the Colorado Eiver of the West." The altitude of the mouth of the Eio Virgin is represented on the profile with this volume as somewhat less than it appears on that made by Lieutenant Ives. Our own determinations fix it as we represent it. Lieutenant Ives's data for the upper portion of his line are indefinite, but can be interpreted to agree with the results which we have obtained; perhaps better than with his own profile. As far as possible we have adopted the names of geographic features used by the settlers of the adjacent country, but many of the mountains, plateaus, valleys, canons, and streams were unknown and unnamed. In such cases we have accepted the Indian names, whenever they could be determined with accuracy. I intend, finally, to publish a glossary of all these new names, giving their significance. I am greatly indebted to many gentlemen living in Utah, Wyoming, and Colorado Territories for their assistance and co-operation in this enterprise. To mention them severally would inordinately swell this preface. Professor A. H. Thompson has been my companion and collaborator during the greater part of the time, arid has had entire charge of the geo- |
