Image from Wikimedia Commons
Library of Congress? - Public Domain
user at project - Public Domain
Sans nom d'auteur. - CC0 1.0
Erich Correns (painter) - Public Domain
Josh Hallett at https://www.flickr.com/photos/hyku - CC BY-SA 2.0
Trotsdaughter2 - CC BY-SA 4.0
unknown - Public Domain
Gerardus - Public Domain
Dante Gabriel Rossetti - Public Domain
Antoni Oleszczyński - Public Domain
Smithsonian Institution Archives -
John Hall - Public Domain
myself - CC BY-SA 3.0
Alwms77 - CC BY-SA 4.0
Marco Bakker, photographer for Elsevier Magazine - CC BY-SA 3.0
Falk - Public Domain
Babrinson77 - CC BY-SA 3.0
Author of image is not identified in the source. - Public Domain
Jcrbaustin - CC BY-SA 3.0
Resolute - CC BY-SA 3.0
Image from Wikimedia Commons
Library of Congress? - Public Domain
Burrows, Julius C. (Julius Caesar), 1837-1915
Image from Wikimedia Commons
user at project - Public Domain
Jaynes, E. T. (Edwin T.)
Image from Wikimedia Commons
Sans nom d'auteur. - CC0 1.0
Jaloux, Edmond, 1878-1949
Image from Wikimedia Commons
Erich Correns (painter) - Public Domain
Zwirner, Ernst Friedrich, 1802-1861
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Ladenburg, Albert, 1842-1911
Image from Wikimedia Commons
Josh Hallett at https://www.flickr.com/photos/hyku - CC BY-SA 2.0
Benson, Jodi
Image from Wikimedia Commons
Trotsdaughter2 - CC BY-SA 4.0
Trotman, Lloyd
Image from Wikimedia Commons
unknown - Public Domain
Brialmont, Alexis Henri, 1821-1903
Image from Wikimedia Commons
Gerardus - Public Domain
Brown, Ralph, 1928-2013
Image from Wikimedia Commons
Dante Gabriel Rossetti - Public Domain
Hake, Thomas Gordon, 1809-1895
Image from Wikimedia Commons
Antoni Oleszczyński - Public Domain
Czajkowski, Michał, 1804-1886
Image from Wikimedia Commons
Smithsonian Institution Archives -
Dart, Raymond A. (Raymond Arthur), 1893-1988
Image from Wikimedia Commons
unknown - Public Domain
Schlözer, Kurd von, 1822-1894
Image from Wikimedia Commons
John Hall - Public Domain
Scott, John, 1731-1783
Image from Wikimedia Commons
myself - CC BY-SA 3.0
Hacke, Alexander
Image from Wikimedia Commons
Alwms77 - CC BY-SA 4.0
McCaslin, Matthew, 1957-....
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Elwes, Cary, 1962-....
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Smith, E. A. (Edgar Albert), 1847-1916
Image from Wikimedia Commons
Marco Bakker, photographer for Elsevier Magazine - CC BY-SA 3.0
Joustra, Arendo
Image from Wikimedia Commons
Falk - Public Domain
Kidder, Kathryn
Image from Wikimedia Commons
Babrinson77 - CC BY-SA 3.0
Johnson, Luther, 1934-1976
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unknown - Public Domain
Lindblom, Gunnel, 1931-....
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Author of image is not identified in the source. - Public Domain
Downing, Charles, 1802-1885
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unknown - Public Domain
Doane, Gustavus Cheyney, 1840-1892
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Jcrbaustin - CC BY-SA 3.0
Ponce, Carlos
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Holloway, Sterling
Image from Wikimedia Commons
Resolute - CC BY-SA 3.0
Carter, Gary, 1954-2012
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Beach, Michael Hicks, 1837-1916
Image from Wikimedia Commons
Rice, Jim, 1953-
Image from Wikimedia Commons
unknown - Public Domain
Dwan, Dorothy, 1906-1981