Mine Reef Exp. Synd. Ltd. (Syferfontein 21) N. of Eleazar

• ZA HPRA A1138-J-368
• File

Part of James Charles Napoleon Humphreys, Mining papers

Ochre - Potchefstroom - Young

• ZA HPRA A1138-J-367
• File

Part of James Charles Napoleon Humphreys, Mining papers

Potchefstroom - Achaelogy & Geology - Anderson & Stanley

• ZA HPRA A1138-J-366
• File

Part of James Charles Napoleon Humphreys, Mining papers

Klerksdorp Goldfields Proprietary, Ltd. Onthaven

• ZA HPRA A1138-J-364
• File

Part of James Charles Napoleon Humphreys, Mining papers

Klerksdorp Black Reef

• ZA HPRA A1138-J-363
• File

Part of James Charles Napoleon Humphreys, Mining papers

Buffelsdoorn Estate & G.M. Co. Ltd. -Buffelsdoorn Tributes, Ltd.

• ZA HPRA A1138-J-362
• File

Part of James Charles Napoleon Humphreys, Mining papers

Geology of Klerksdorp

• ZA HPRA A1138-J-361
• File

Part of James Charles Napoleon Humphreys, Mining papers

Klerksdorp District

• ZA HPRA A1138-J-360
• File

Part of James Charles Napoleon Humphreys, Mining papers

Western Reefs Exp. & Dev. Co., Ltd., Anglo-American, Etc

• ZA HPRA A1138-I-353
• File

Part of James Charles Napoleon Humphreys, Mining papers

Far West Rand Exp. Co., Ltd., Klerksdorp

• ZA HPRA A1138-I-352
• File

Part of James Charles Napoleon Humphreys, Mining papers