8vo., (9 1/8 x 5 7/8 inches). Fine folding frontispiece map of “The Sacramento Valley from the American River to Butte Creek” (a few professionally repaired tears, edges browned), fine folding lithographed “Sketch of the Route of Capt. Warner’s Exploring Party in the Sacramento Valley and Sierra Nevada,” 10 fine folding lithographed geological sections, including “Geological Reconnoissances in California” and “Survey of Public Lands in the Gold Region.”
Provenance: Presentation inscription “Dr. J. I. Cohen with the respects of his friend P. T. Tyson” to front free endpaper, ownership inscription to front pastedown “Joshua I. Cohen.” Alta California Books, October 1971. From the important cartographical library of Warren Heckrotte, his sale, Rare Cartography, Exploration and Voyages, Part II, December 3, 2015, Lot 74.
First edition thus. PRESENTATION COPY. Important work containing three significant maps of the Gold Region, first published the preceding year as a Senate document, although this is an expanded version. Tyson was in California in the summer and early fall of 1849, part of the flurry of surveying activity between the Mexican War and the Boundary Survey. Wheat notes that the work was “probably the earliest work of true scientific research to emerge from the Gold Rush.” Other geological sections include: “Geological Section from Bodega Bay to the Sierra Nevada”; “Geological Section from San Francisco to the Sierra Nevada”; “Geological Sections in the Gold Region of the Sierra Nevada”; “Geological Section in the Gold Region from the Yuba to Coloma”; “Geological Section in the Gold Region from the Cosumes to the Calaveras”; “Section of a Valley”; “Geological Section at Bodega Point”; “Natural Cross Section in Veins of Gold Bearing Quartz”; and “Sketch of the Route of Capt. Warner’s Exploring Party in the Sacramento Valley and Sierra Nevada.” Howes T-455. Wheat Gold Region 149 for Derby map; 179 for Geological Reconnaissance map; 182 for Williamson map.