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Mammoth Bar Mine, Middle Fork of American River, Placer County, View of Mammoth Bar Mine in Placer
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Mammoth Bar Mine, Middle Fork of American River, P...

View of Hobson Mine in Placer County, California, Hobson Mine, Placer County, page, photomechanical
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View of Hobson Mine in Placer County, California, ...

Placer Mining, Flume in Brown’s Flat, Tuolumne County, c. 1868, Thomas Houseworth & Co., American,
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Placer Mining, Flume in Brown’s Flat, Tuolumne Cou...