the New Continent During the Years 1799-1804, by a de Humboldt and a Bonpland; with Maps", "Tagebuch Einer Reise Vom Mississippi Nach Den Ku Sten der Su Dsee... . Eingefu Hrt Von A. Von Humboldt. Mit 13 Illustrationen, Etc" and "Diary of a Journey from the Mississippi to the Coasts of the Pacific, with a United States Government Expedition Translated by Mrs P Sinnett"