7 books • 2 series
The Southern Nilo-Hamites
The Northern Nilo-Hamites
The Galla of Ethiopia; The Kingdoms of Kafa and Janjero
The Historical Geography of Ethiopia from the First Century A.D.to 1704 (Fontes Historiae Africanae: Series Varia, IV)
The Prester John of the Indies (Hakluyt Society, Second)
Some Records of Ethiopia, 1593-1646 (Hakluyt Society, Second)
The Nandi of Kenya