This series contains materials relating to William L. Honnold's career in South Africa, first as Consulting Engineer, and from 1912, as Johannesburg Managing Director of Consolidated Mines Selection Company and chairman of all the Transvaal companies under the company's immediate control: Brakpan Mines, Springs Mines, the New Era Consolidated, and the Transvaal Coal Trust. The records of the company itself include minutes of the Board of Directors from September 1912, when Honnold joined the Board, until his departure in May 1915. Honnold's reports to the chairman and directors consist almost entirely of weekly reports on operations at each of the company's mines. There are separate files on Brakpan Mines, the company's most important holding at the time, and Honnold's special interest. The correspondence from the London Secretary (Charles W. Moore) relates almost exclusively to Honnold's investments in the stock of the company and its subsidiaries. Additional files contain "confidential" and "private" correspondence with Moore, not only relating to Honnold's investments but also, inter alia, to more personal matters, such as the building of Honnold's house in Johannesburg, the purchase of furniture in Europe and its transportation to South Africa, Caroline Honnold's travels, and her personal effects. Other files contain extensive confidential and private correspondence with other members of the Consolidated Mines Selection Company Board, including Walter McDermott, from 1912 until his death in 1940 Chairman of the company; and London Managing Directors Berthold Kitzinger (1871-1922), nephew of Anton Dunkelsbühler, and Julius (Jules) Sigismund Wetzlar (1866-1938). (Both Moore and Wetzlar later joined the Anglo American Corporation of South Africa, the former in 1918 as London Secretary, the latter as a Board member and ultimately Deputy Chairman.) The letters from Robert Goering, of Berlin, a German member of the Consolidated Mines Selection Company Board, and a fellow engineer, are particularly candid, and provide particular insight into the profession of mining engineer in the early years of the 20th century. The correspondence with Mr. (from 1921 Sir) Ernest Oppenheimer (1880-1957) documents the early relationship to the two founders of the Anglo American Corporation of South Africa, while the correspondence with Herbert Hoover documents the two men's early collaboration; one of these collaborations, a proposed gold mining venture at Dominion Creek, Yukon Territory, is further detailed in the correspondence with A. Chester Beatty. Four bound letterbooks contain additional correspondence for this period, with these and other individuals.