... An account of the progress of the expedition to Central Africa, performed by order of Her Majesty's Foreign office, under Messrs. Richardson, Barth, Overweg & Vogel, in the years 1850, 1851, 1852, and 1853. Consisting of maps and illustrations, with descriptive notes, constructed and comp. from official and private materials by Augustus Petermann ...Great Britain. Foreign OfficeJustus Perthes (Firm : Gotha, Germany) Moras, Ferdinand, 1821-1908Petermann, A. (August Heinrich), 1822-18781854Hand colored map.In double columns. In portfolio.cartographic