Official map of San Bernardino County, California : compiled from latest official maps of U.S. surveys, railroad and irrigation surveys, county records, and other reliable sources / & drawn by T.D. Beasley
See RB 477777 for a map of the Southwest portion of San Bernardino County. Submaps shows claims in mining distrcts. "We the members of the Board of Supervisors of San Bernardino County California, hereby adopt this map as the Official Map of said County. San Bernardino, May 18th, 1892." Submaps: Mining districts of Calico, Holcomb Valley, Bear Valley, Clark, Ord Mountain, Trojan with claims. Prime meridian: Gm. Relief: hachures. Graphic Scale: Miles. Projection: Cylindrical. Printing Process: Lithography.