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Robert "Bob" Wilson pictured in a canyon in the San Bernardino area, California: photographic print

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Robert "Bob" Wilson running his placer mill at Ophir Canyon, Toiyabe Mountains, Nevada: photographic print

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Three identified men at Ophir Canyon, Toiyabe Mountains, Nevada: photographic print

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Robert "Bob" Wilson operating his triple-drum, slusher-feeding system: photographic print

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Bobbie Number 4 incline shaft located in Ophir Canyon, Toiyabe Mountains, Nevada: photographic print

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Placer mill belonging to Robert Wilson in Round Mountain, Nevada: photographic print

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Wilson's placer plant in Ophir Canyon, Nevada: photographic print

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Trommel screen, part of the placer mill: photographic print

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Placer mining plant in Ophir Canyon, Nevada: photographic print

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Bob Wilson's hard-rock mill crusher and flywheel: photographic print

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Placer mining plant: photographic print

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Pilot cyanide plant belonging to Robert "Bob" Wilson located at his mill site in Nevada: photographic print

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Jimmy Williams packing ore out of the Toiyabe Mountains, Nevada: photographic print

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Equipment at "Bob" Wilson's home in Nevada: photographic print

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Wheel pulley sold to Raymond Popplman, Boulder City, Nevada: photographic print

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Stamp mill timbers incorporated into the home belonging to Raymond Popplman, Boulder City, Nevada: photographic print

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Dredge in Manhattan: photographic print

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Dredge in Manhattan, Nevada: photographic print

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