Nice pair of California Gold Rush period maps. First (8.5 x 8") shows township lines overlaid with diagonal lines indicating gold bearing veins. The second map, by Philip T. Tyson (14.8 x 11.8"), is a generalized map of the geology of central California east and north of San Francisco Bay. It extends to the Sierra Nevadas and names many gold regions: Mormon, Coloma, Spanish Bar, and many areas simply marked GOLD. Shows the Emigrant's Road to Salt Lake.