D.Crawford, Thinking Black: 22 Years without a Break, in the Long Grass of Central Africa (London, 1912), 55, процитировано в: M.S.Sweetnam, “Dan Crawford, Thinking Black, and the Challenge of a Missionary Canon”, JEH, 58 (2007), 705–725, at 721; курсив оригинала. О братьях см. с. 981–982.