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Historical Papers Research Archive, University of the Witwatersrand James Charles Napoleon Humphreys, Mining papers
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Underground workings of South Reef
Underground workings of South Reef
Underground workings of Main Reef and Main Reef Leader
Underground workings of Main Reef and Main Reef Leader
Underground workings of South Reef
Underground workings of South Reef
Underground workings of Main Reef and Main Reef Leader
Underground workings of Main Reef and Main Reef Leader
Underground workings of South Reef and Bird Leader
Underground workings of South Reef and Bird Leader
Underground workings
Underground workings
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings
Underground workings
Underground workings
Underground workings
Underground plan of Main Reef Leader working
Underground plan of Main Reef Leader working
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