Humboldt, Alexander von - Autograph Letter Signed 1812 _more He toured extensively and left

He toured extensively and left many recordings

shown in William Tell

unsigned photo shown as Klingsor in Parsifal

shown in the title role in Mignon

Argentine soprano (1896-1969)

Humboldt, Alexander von - Autograph Letter Signed 1812 _more He toured extensively and leftGerman 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