Contains a detailed description of how Mexican Mining Law works, the costs for permits and how to stake out claims. Also instructions for crossing the border by wagon. Mexican Mining Laws interpreted below map. "Compiled from official authentic maps and sketches (on record) from special investigation in person and assisted by the oldest and most expert Mexican prospectors, 1888-1889." MS note: 358332. Prime meridian: GM. Relief: hachures. Graphic Scale: Kilometers. Projection: Plane. Printing Process: Lithography. Verso Text: Ms note: Bancrofts Map of Mineral Districts Lower Northern California 1888.
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