Washington: Gales & Seaton, Printers, 1845. First edition, Senate issue. Hardcover. Original dark brown ribbed cloth stamped in blind and with gilt spine title, octavo (6 x 9.25 inches), 693pp. 22 lithograph plates, including 13 views, 5 plates of fossils, and 4 botanical plates. 4 maps bound in, including 2 folding maps, large (30 x 50-inch) lithograph map by Charles Preuss in separate folder. Rebacked with original spine laid down, original endpapers. Cover cloth is very clean and gilt spine title unworn. Some spotting to plates, but text, plates and maps are overall remarkably clean and bright. Large folding map with some wear to folds, but near very good. Very good. Item #20328
Senate issue, including the astronomical and meteorological reports omitted from the House issue (and later reprints). Fremont's expeditions of 1842-44 resulted in the first reliably mapped route to the west coast. As expedition leader, Fremont achieved all he set out to do and more. After attaining his objective in Oregon in the fall of 1843 he turned his party south to the Great Basin and then -following the Truckee River- crossed the Sierra Nevada in January and February of 1844, reaching Sutter's Fort on March 6 without losing a man, though only half the party's animals reached their destination and a brass cannon was abandoned on the way. One of the folding maps in the text charts the course of the Rio de los Americanos (American RIver) from Mountain Lake (Lake Tahoe) to the Sacramento at New Helvetia. The large map accompanying his report was drawn by Charles Preuss, Fremont's topographical assistant (though he is not credited in the legend) and it is considered a monument of field topography and mapmaking. Zamorano 80 #39, Cowan page 223, Wagner-Camp IV:115:1, Graf 1436, Howes F370).