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James Charles Napoleon Humphreys, Mining papers
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Randfontein Estates
Randfontein Estates
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 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 plan of West Reef and Lindum Reef workings
Underground plan of West Reef and Lindum Reef workings
New Steyn Estates
New Steyn Estates
Central West
Central West
Roodepoort United M. R. G.M. Co. , Ltd.
Roodepoort United M. R. G.M. Co. , Ltd.
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