The pilgrimage to Mecca made on foot across Africa from west to east between the desert and the tropical forest keeps many West Africans in close touch with the valley of the Nile. The pilgrims follow a route along which culture must from the earliest times have been spread by refugees, traders, military expeditions and the like. (In these latter days motorized convoys of West African troops and aerial reinforcements for the Middle East have followed the same route).

Over twenty years’ service in the Anglo-Egyptian Sudan (of which twelve years were spent in Darfur, where the cultural and political influence of West Africa was strong in medieval times, and is still felt today), has left me much interested in West Africa, although I have never been there.