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To the Central African lakes and back. The narrative of the Royal Geographical Society's East Central African expedition, 1878–80. With a short biographical notice of the late Mr. Keith Johnston, portr., and a map. In 2 vol. Vol. 2 / by Joseph Thomson. – London : Sampson Low, Marston, Searle & Rivington, 1881. – VIII, 323, [1] p. : ill., portr., map.