Here are a list of links that you may find useful: 
A link to the South African Nursing Council (SANC).
A link to the McGregor museum in Kimberley. 
A link to the SA History Online web site which has a short profile of Cecilia Makiwane, the first registered professional black nurse in South Africa and Africa.
This is a sizable collection. The Bridgman Family Papers document the family’s time and achievements as missionaries to South Africa over nearly a century (1860-1949) and includes specific reference to training of black nurses.
Historical papers related to the training of black professional nurses in South Africa (University of the Witwatersrand). 
Some SA Nursing historical artifacts held at the University of the Free State.

Theses and dissertations:
A dissertation by Rathani Sikhitha titled: "The development of nursing and nursing education in Venda from 1911 to 1990".
A dissertation by Joan Esterhuizen titled: "The professional development of Black South Africa nurses 1908-1994: a historical perspective."
A thesis by Thokozani Mhlongo titled: "Towards culture care nursing education : a study of T.G. Mashaba's transcultural themes."
A thesis by Colonel Baloyi titled: "The role of the state in the establishment of a culture of learning and teaching in South Africa(1910 - 2004)." 

Wikipedia articles: