Humboldt, Alexander von - Autograph Letter Signed 1812 _more dated in pencil in London

dated in pencil in London

Lot of 2 full concert programs: 1) performing Beethoven´s piano concert Nr 4

dated the next day

including: Alexander Kramarov

w/envelope

Humboldt, Alexander von - Autograph Letter Signed 1812 _more dated in pencil in LondonGerman geographer, naturalist and explorer (1769 1859), who made very significant contributions to several fields of science including botany, zoology and geophysics. After 5 years (from 1799 through 1804) of travelling through Latin America, Humboldt published a series of large volumes with valuable information, later was the first to propose that humans were changing the world climate. Autograph letter signed, to British writer Helen Maria Williams