DUPONCHEL (Adolphe) The Trans-Saharan Railway, a colonial junction between Algeria and Sudan Montpellier, Boehm & fils, 1878, in-8, half marine basane (modern binding). Two cards folded. A copy of François-Prosper Jacqmin (1820-1889), a polytechnicien who had been director general of the Eastern Railways since 1872, with the author's autograph next to the title. It is also to Jacqmin that the 5 L.A.S. attached to our volume are addressed, which cover various aspects of the project since a copy of this report was sent.