ISBN 0-415-94901-7* Hinde, "The Fall of the Congo Arabs" (London, 1897)* Johnston, "George Grenfell and the Congo" (two volumes, London, 1908).
ISBN 0-415-94901-7* Hinde, "The Fall of the Congo Arabs" (London, 1897)* Johnston, "George Grenfell and the Congo" (two volumes, London, 1908).