Washington DC: 31st Congress, 1st Session. Senate Report 18. Serial 577, 1850. Very Good. First Edition. [21x19.5in]; Title in lower left corner with different stylized lettering; a lithograph map of Northern California from just south of Monterey to just north of Sacramento and from the Pacific Ocean to the Sierra foothills; showing General Bennett Riley's July 1849 route through the mining districts with dates visiting the mining camps in the Sierra foothills, the map details the earliest names of the mining camps and settlements throughout the region along the American, Cosumne, Dry Creek, Mokelumne, Calaveras, Stanislaus, Tuolumne, Merced, Lost Creek, Maraposa [sic] and King rivers of the Central Valley draining to the San Joaquin river. Lt. Derby provides topographical and travel conditions along the route; The map is printed on thin paper and the fold creases are evident, neat lines are all present, archival tape repairs to upper left and lower right edges and in several areas on back of fold creases, small chips and closed tears along edges, medium chips at lower left and right corners with no loss of text or neat lines, mounted on acid free boards. [Wheat Maps 79, Kurutz 106a, Wagner-Camp 179b]. Item #13515
This is an important and, at the time, a highly desirable map of California Gold Rush diggings. The map provides the earliest names and location of the mining camps and diggings in the central Sierra foothills. The more populated camps were Mormon Island (misspelled Mormont), Coloma (mislabeled Colluma), Curtis, Sullivan's, Jamestown, Woods, Maj. Miller's and Sonoran Camps. The routes are dated and the map is very detailed in the geography, terrain and communities.
General Bennett Riley (1787-1853) was the 6th and last Military Governor of California in 1849. He ordered four surveys of California to be lead by Lt. George Derby (1823-1861). From Wheat, "... George Horatio Derby, born at Dedham, Massachusetts, April 2, 1823, graduated from West Point in 1846, and after a tour of duty in the East and Middle West, came to California in 1849. He accompanied Brig Genl. Bennet Riley on a tour of the gold districts during the summer of that year, and his `Sketch of General Riley's Route' was the result of that journey." The purpose was to identify existing settlements and mining camps and determine locations of strategic military supply routes and posts to "... afford protection for and from the Indians and keep the peace among the gold miners." [William H. Goetzmann, Army Exploration in the American West 1803-1863, Yale University Press, 1959, p.255]. This map relates to another important early map of the Sacramento Valley surveyed in September and October 1849 from north of Sacramento City to the Butte River (the second survey ordered by General Riley).