Complex sentence: In later years some also saw service on the Natal mainline and the Cape Midland System, while a number of them were transferred to the Cape Western System where they served as banking locomotives up the Hex River Railpass between De Doorns and Touws River.
Split into simpler sentences: In later years, some also saw service on the Natal mainline and the Cape Midland System. A number of them were transferred to the Cape Western System, where they served as banking engines up the Hex River Railpass between De Doorns and Touws River.