Map of El Dorado County, California | Library of Congress
Shows drainage, ditches, mines and mineral resources, township and section lines, etc. "Trustees, W.M.C. Ralston, Thomas B. Bishop, Frank G. Drum, F.H. Harvey, Frank Monaghan." Locations of mines and mineral deposits are numbered but not named on map. LC copy stamped on: 1561. Available also through the Library of Congress Web site as a raster image.