by Alexander von Humboldt
by Alexander von Humboldt
by Alexander von Humboldt
by Aimé Bonpland, Alexander von Humboldt
by Aimé Bonpland, Alexander von Humboldt
by Aimé Bonpland, Alexander von Humboldt
by Thomas Whiffen
by Alexander von Humboldt
by J. A. (John Augustine) Zahm
by Harry Alverson Franck
by Charles Joseph Finger
by Annie S. (Annie Smith) Peck
by Harry Alverson Franck
by Thomas Cleland Dawson
by Thomas Cleland Dawson
by Bartolomé Mitre
by Hiram Bingham
by George Whitfield Ray
by Henry Stephens
by Viscount James Bryce Bryce
by Robert Lehmann-Nitsche
by W. H. (William Henry) Koebel
by Maturin M. (Maturin Murray) Ballou
by Gaston Lemay
by Juan Valera
by Leo E. (Leo Edward) Miller
by Walter Colton
by Guillermo A. (Guillermo Antonio) Sherwell
by Friedrich Gerstäcker
by Robert Grant Watson
by Harry Weston Van Dyke
by Thomas Wallace Knox
by active 1803-1825 William Bennet Stevenson
by Freiherr von Ernst Bibra
by Manuel Emílio Gomes de Carvalho
by Freiherr von Ernst Bibra
by Gardiner G. (Gardiner Greene) Hubbard
by Katharine A. Hodge
by active 1803-1825 William Bennet Stevenson
by active 1803-1825 William Bennet Stevenson
by Jules Crevaux
by Oskar von Riesemann
by A. S. (Archibald Stevenson) Forrest
by John Ball
by Colin Ross
by Robert Grant Watson
by Earl of Thomas Cochrane Dundonald
by Earl of Thomas Cochrane Dundonald
by D.D. James Thomson