(1945). London: Chatto & Windus, Number One in the Oppenheimer Series, Wallis, J.P.R. (ed.) The Matabele Mission, (1945). London: Chatton & Windus, Number Three in the Oppenheimer Series, Volume I covering the years 1869-1870, Volume II covering the years 1870-1871, Volume III covering the years 1871-1872, Fripp, Constance E. and Hiller, V.W. (eds.) Gold and the Gospel in Mashonaland, 1888, (1949). London: Chatton & Windus, Number Four in the Oppenheimer Series, Schapera, I. (ed.) Apprenticeship at Kuruman, (1951). London: Chatton & Windus, Number Five in the Oppenheimer Series, Wallis, J.P.R. (ed.) The Zambesi Journal of James Stewart, 1862-1863, (1952). London: Chatton & Windus, Number Six in the Oppenheimer Series, Wallis, J.P.R. (ed.) The Barotseland Journal of James Stevenson-Hamilton, (1953). London: Chatto & Windus, Number Seven in the Oppenheimer Series and Wallis, J.P.R. (ed.) The Southern African Diaries of Thomas Leask, 1865-1870, (1954). London: Chatto & Windus, Number Eight in the Oppenheimer Series