- collectionA1138 - James Charles Napoleon Humphreys, Mining papers
- Série organiqueD - Central Rand Producers
- Dossier147 - E. R. P. M.
- Pièce147.8 - Underground workings
- Pièce147.1 - Underground workings
- Pièce147.2 - Underground workings
- Pièce147.3 - Underground workings
- Pièce147.4 - Underground workings
- Pièce147.5 - Underground workings
- Pièce147.6 - Underground workings
- Pièce147.7 - Underground workings