Image from Wikimedia Commons
unknown - Public Domain
G.V. Buck - Public Domain
Artist unknown - Public Domain
Carl Mittag - Public Domain
Alain Kirili - CC BY-SA 3.0
Studio Publicity - Public Domain
Charlesdrakew - Public Domain
Fronteiras do Pensamento - CC BY-SA 2.0
Harper's Weekly, (1860 Dec. 22). - Public Domain
No photographer credited in original source. - Public Domain
Public Domain
Guillaume Voiriot - Public Domain
Library of Congress - Public Domain
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unknown - Public Domain
Rumsey, Mary Harriman, 1881-1934
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unknown - Public Domain
Cornplanter, Edward, 1856-1918
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McCleary, J. T. (James Thompson), 1853-1924
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G.V. Buck - Public Domain
Walker, John Grimes, 1835-1907
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Cibber, Colley, 1671-1757
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List, Friedrich, 1789-1846
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Cornwallis, William, Sir, 1744-1819
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Artist unknown - Public Domain
Wright, Benjamin, 1770-1842
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Carl Mittag - Public Domain
Marx, Adolf Bernhard, 1795-1866
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Alain Kirili - CC BY-SA 3.0
Lopez-Huici, Ariane
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Studio Publicity - Public Domain
Jackson, Glenda
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Charlesdrakew - Public Domain
Akroyd, Edward, 1810-1887
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Al-Amin, Jamil, 1943-
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unknown - Public Domain
Davis, Jeff, 1862-1913
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Fronteiras do Pensamento - CC BY-SA 2.0
Paglia, Camille, 1947-....
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Roberts, Diane, 1959-....
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Thomas, Arthur Lloyd, 1851-1924
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Harper's Weekly, (1860 Dec. 22). - Public Domain
Boyce, William Waters, 1818-1890
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Meiklejohn, Alexander, 1872-1964
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Freeman, Y. Frank, 1890-1969
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Leakey, Mary D. (Mary Douglas), 1913-1996
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O'Neal, Frederick, 1905-1992
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unknown - Public Domain
Sorel, Albert, 1842-1906
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Stone, S. J. (Samuel John), 1839-1900
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No photographer credited in original source. - Public Domain
Onégin, Sigrid (1889-1943).
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Hopkins, Mark, 1813-1878
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Draper, William H. (William Henry), 1894-1974
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Public Domain
Seripando, Girolamo, 1493-1563
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Guillaume Voiriot - Public Domain
Colardeau, Charles-Pierre, 1732-1776
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Library of Congress - Public Domain
Smith, M. L. (Martin Luther), 1819-1866