This first edition Senate volume contains the reports of Lt. A. W. Whipple, Corps of Topographical Engineers, regarding his explorations and discoveries along the 35th parallel. It contains a superb collection of tinted lithographs including the lovely Zuni plate, San Francisco Mountains (Flagstaff), the Mojave Valley, the Mojave Villages, Navajoes (mounted on horseback with spears), plates of weapons, baskets and implements, and the famous Mojave Indians plate showing three heavily tattooed Indians, all by H.B. Mollhausen, the expedition artist. There are approximately 21 tinted plates and several black and white plates including fossils, all full page, plus the colorful, large folding maps: "Geological Section from the Mississippi River to the Pacific Ocean…"; "Geological Map…from the Mississippi River to the Pacific Ocean…"; and "Geological Section…from the Mississippi River to the Pacific Ocean". 4to in original quarter leather and marbled paper binding. Raised spine with gilt title.

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Condition: B

The volume has light scattered foxing on many plates and some of the engravings. An odd semi-circular water stain at bottom of most pages. The binding is rubbed at spine edges and tips. Contents tight except for a loose inside hinge at front.