Map of part of northern Africa, showing the routes of the expedition under Messrs. Richardson, Barth, Overweg & Vogel in the years 1850 and 1853 / constructed by Augustus Petermann.Petermann, A. (August Heinrich), 1822-18781855"London, March 1854, published for the author by E. Stanford, 6 Charing Cross."In top margin: Petermann's geographische Mittheilungen. Tafel 19.Includes ill. of "Artemis oudneyi (Fezzan worm.)".Relief shown by hachures and spot heights.cartographic