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416 pp. Illustrated with 43 lithographed plates, including 3 battle-plans and 14 botanical plates; plus 1 large folding map "Military Reconnaissance of the Arkansas Ro Del Norte and Rio Gila" (30x63"), placed inside envelope in back cover. 8¾x5½, original brown cloth. First Edition, Senate Issue 2.

This is the second Senate issue of the book, with Emory's rank given as Brevet Major. However, it does contain the large folding map, which Wagner-Camp does not call for in this issue. A superb study by topographical engineer and scientist Emory of the lands newly wrested from the Mexican government. As Wagner-Camp notes, "his report was a major contribution to the geographical knowledge of North America. His map, in which he limited himself to recording only the data which he and his assistants had actually observed, was the first accurate depiction of that vast area, and is still regarded as one of the landmarks of American cartography. The report includes sections on the plants and animals, as well as on the geology and the prehistoric town sites and other archeological remains. Emory's descriptions of the various Indian tribes that he encountered were steps toward the newly-forming discipline -Anthropology- concerned with primitive man." The large map is called by Wheat "a document of towering significant in the cartographic history of the West," and "epoch-making." Although Howes gives precedence to the larger House issue, Wagner-Camp lists the Senate as the first; the latter does, however, admit that the various issues and editions have "caused much distress among bibliographers and scholars for many years." Senate Executive No. 7, 30th Congress, 1st Session. Cowan p.195; Graff 1249; Howes E145; Wagner-Camp 148:2; Zamorano Eighty 33.