- collectionA1138 - James Charles Napoleon Humphreys, Mining papers
- Série organiqueA - West Rand Producers
- Dossier1 - Randfontein Estates
- 1 en plus...
- Pièce1.2 - Underground plan of Leader, Horsham and East Reef workings
- Pièce1.3 - Underground plan of Leader, Horsham and East Reef workings
- Pièce1.4 - Underground plan of West Reef, Lindum Reef and Black Reef workings
- Pièce1.5 - Underground plan of Leader, Horsham and East Reef workings
- Pièce1.6 - Underground plan of West Reef and Lindum Reef workings