This extraordinary map of 1855 shows details of Northern Calaveras County along the route of the newly constructed Mokelumne Hill Campo Seco ditch,  stretching from the South Fork of the Mokelumne River near Glencoe to Campo Seco.  Included are roads, communities, ditches, reservoirs, and named gulches,  mines, and ranches. Click on the link below and enlarge map, moving to your area of interest.