Certified copies of letters and documents supporting the claim of the Struben Brothers to be the first discoverers of gold; articles of association and minutes of shareholders meeting of the Sterkfontein Junction Mining Syndicate 4 Mar. 1884; mining maps including A new geological map of the Transvaal by F. Struben, London, 1889 and 'A geological section of the Witwatersrand' drawn by Fred Struben in 1885, reprinted from the Transactions of the Geological Society of South Africa, vol. 50, 1947. 9 photographs (by H.F. Gros) of the Strubens' Confidence Reef 1886 and of Johannesburg 1887 and 1889, used as Christmas greetings cards; 2 postcards from water-colours in the Africana Museum, Johannesburg, one of the Struben Brothers Camp at Wilgespruit as sketched by Edith Struben in 1885 and the other of the Old Farmhouse before the discovery of gold by J.W. George.
Including diary kept by Edith Struben (daughter of H.W. Struben), 1885 and 2 diaries by Mary L. Struben (wife of H.W. Struben), 1884-1887; letters between members of the Struben and Lys families, including correspondence of Godfrey Lys (nephew of the Strubens), Fred, Harry, Edith and Mary Struben.