Travels, Researches, and Missionary Labours, During an Eighteen Years' Residence in Eastern Africa : Together with Journeys to Jagga, Usambara, Ukambani, Shoa, Abessinia, and Khartum, and a Coasting Voyage from Mombaz to Cape Delgado

J. Lewis Krapf; with an appendix by E. G. Ravenstein