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James Charles Napoleon Humphreys, Mining papers Item With digital objects
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Underground plan, Battery Section (Rietvlei no. 113)
Underground plan, Battery Section (Rietvlei no. 113)
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of West Reef, Lindum Reef and Black Reef workings
Underground plan of West Reef, Lindum Reef and Black Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of Battery Reef
Underground workings of Battery Reef
Underground workings of Main Reef
Underground workings of Main Reef
Underground workings of Battery Reef
Underground workings of Battery Reef
Underground workings of Battery and Bird Reef
Underground workings of Battery and Bird Reef
Underground workings of Main Reef
Underground workings of Main Reef
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