File consists of: clippings about copper mining in the Belgian Congo and Rhodesia, 1929; a memo regarding manganese deposits in South Africa, 1929; a map of the main roads crossing Africa, undated; and a report on the 'Vlakpontein nickel deposits' in the Transvaal, South Africa, written by Robert Hoffman in 1930. The report includes a history of the region, the location of the nickel deposits and a geological study.

File consists of a photograph album documenting Mackenzie's cruise to The Canary Islands, South Africa and England and his life in London, England.