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Courtesy of Society of California Pioneers
http://www.oac.cdlib.org/ark:/13030/kt9j49q37d/?order=1

Title:

1006. Placer Mining -- Columbia, Tuolumne County. From the top of the Dump-box.

Creator/Contributor:

Lawrence & Houseworth, publisher

Date:

1860/1870

Contributing Institution:

Society of California Pioneers