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Placer Mining Columbia Tuolumne Co. The Columbia Claim NYPL bGF B. en Placer Mining Columbia Tuolumne Co The Columbia Claim nypl org Scan by NYPL Placer Mining Columbia Tuolumne Co The Columbia Claim no Waterwheels Hydraulic mining The Miriam and Ira Wallach Division of Art Prints and Photographs Photography Collection adcffbdabc