This large map shows the most important mining district in California and is a fascinating look at late l9th Century California Gold Mining. The detailed map is centered on Columbia and names 510 mines. It covers over 800 square miles and extends from San Andreas in the northwest to Groveland and Big Oak Flat. The map is also notable as being a very late Britton & Rey imprint. Compiled by Eugene H. Barton, C.E. & M.E. Sonora, California, June 1896, engraved by W.W. Ayers, and published in San Francisco.

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Condition: A

Very clean with a minor damp stain in the bottom margin. The map has been professionally backed with light Japanese tissue. There are some minor edge tears, well away from the map.