Image from Wikimedia Commons
Gorupdebesanez - CC BY-SA 3.0
w - Public Domain
Alan Light - CC BY 2.0
Congressional Pictorial Directory - Public Domain
Caswall, Henry, 1810-1870. - Public Domain
US Government - Public Domain
L. Chapon pour Almanach de la littérature, Pagnerre, 1865 - Public Domain
Thomas P. Anshutz - Public Domain
Emile Derbier - CC BY-SA 3.0
Unknown - Public Domain
Max Schneider, Wien VIII., Kochgasse 20 - Public Domain
not stated - Public Domain
Mason & Co (Robert Hindry Mason) - Public Domain
Boris Riabinin / Борис Рябинин -
unknown - Public Domain
User at project link - Public Domain
GFHund - CC BY 3.0
Bahudhara - CC BY-SA 3.0
Photographer not credited - Public Domain
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Arnauld, Antoine, 1612-1694
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Gorupdebesanez - CC BY-SA 3.0
Kaufman, Philip, 1936-....
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Kobell, Wilhelm von, 1766-1853
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w - Public Domain
Herrmann, August, 1859-1931
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Huntingford, George Isaac, 1748-1832
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Smith, S. A. (Samuel Axley), 1822-1863
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Alan Light - CC BY 2.0
Simon, Carly, 1945-
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Congressional Pictorial Directory - Public Domain
Castle, Michael N., 1939-
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Planck, Erwin, 1893-1945
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Caswall, Henry, 1810-1870. - Public Domain
Leacock, Hamble James, 1795-1856
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Kremer, Isa, 1887-1956
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Glover, John, 1767-1849
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US Government - Public Domain
Hunt, E. Howard (Everette Howard), 1918-2007
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L. Chapon pour Almanach de la littérature, Pagnerre, 1865 - Public Domain
Gozlan, Léon, 1803-1866
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Thomas P. Anshutz - Public Domain
Sullivant, T. S. (Thomas Starling), 1854-1926
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Emile Derbier - CC BY-SA 3.0
Kistemaeckers, Henry, 1872-1938
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Unknown - Public Domain
Hall, Owen, 1853-1907
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Max Schneider, Wien VIII., Kochgasse 20 - Public Domain
Durig, Arnold, 1872-1961
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not stated - Public Domain
Williamson, C.N. (Charles Norris), 1859-1920
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Mason & Co (Robert Hindry Mason) - Public Domain
Selwyn, George Augustus, 1809-1878
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Boris Riabinin / Борис Рябинин -
Bessmertnova, Natalia, 1941-2008
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unknown - Public Domain
Ritz, Walther, 1878-1909
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Sengai, 1751-1837
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unknown - Public Domain
George, Walter F. (Walter Franklin), 1878-1959
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User at project link - Public Domain
Alessandrini, Goffredo, 1904-1978
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GFHund - CC BY 3.0
Nordheim, Lothar, 1899-
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Butcher, Harry C. (Harry Cecil), 1901-
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Pontekorvo, B. (Bruno), 1913-1993
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Bahudhara - CC BY-SA 3.0
O'Donoghue, Lowitja, 1932-
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Photographer not credited - Public Domain
Lassiter, Francis Rives, 1866-1909