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James Charles Napoleon Humphreys, Mining papers Item With digital objects
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Underground workings
Underground workings
Underground workings of Main Reef and Main Reef Leader
Underground workings of Main Reef and Main Reef Leader
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Bird Reef
Underground workings of Bird Reef
Underground workings
Underground workings
Underground workings
Underground workings
Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
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