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Spencer Shier - Public Domain
No photographer credited. - Public Domain
James Reeve Stuart (1834-1905) - Public Domain
w:Rajasekharan Parameswaran - CC BY-SA 3.0
ubknown - Public Domain
Georges Biard - CC BY-SA 3.0
Angela George - CC BY-SA 3.0
Greg Hernandez - CC BY 2.0
August Jerndorff - Public Domain
Gyldendal/Rosa Metz-Parsberg (1872–1963) - Public Domain
Gaetano Chierici - Public Domain
unknown - Public Domain
Acscosta - CC BY-SA 3.0
Harris & Ewing - Public Domain
pseudonymous (Adolf Eckstein's Verlag) - Public Domain
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Russell, George William, 1867-1935
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Spencer Shier - Public Domain
Hanson-Dyer, Louise, 1884-1962
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No photographer credited. - Public Domain
Montgomery, Helen Barrett, 1861-1934
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Hegel, Georg Wilhelm Friedrich, 1770-1831
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Weiner, William
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James Reeve Stuart (1834-1905) - Public Domain
Peck, George W. (George Wilbur), 1840-1916
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w:Rajasekharan Parameswaran - CC BY-SA 3.0
Makhmalbāf, Samīrā, 1980-
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ubknown - Public Domain
Sampson, John, 1862-1931
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Georges Biard - CC BY-SA 3.0
Serrault, Michel, 1928-2007
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Polk, Charles Peale, 1767-1822
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Cornish, Nellie Centennial, 1876-1956
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Angela George - CC BY-SA 3.0
Leslie, Lisa, 1972-
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Greg Hernandez - CC BY 2.0
Buckley, Betty
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Baxter, Richard, 1615-1691
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August Jerndorff - Public Domain
Steenstrup, J. Japetus Sm. (Johannes Japetus Sm.), 1813-1897
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Halford, Henry, Sir, bart., 1766-1844
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Georges Biard - CC BY-SA 3.0
Brosnan, Pierce
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Gyldendal/Rosa Metz-Parsberg (1872–1963) - Public Domain
Høffding, Harald, 1843-1931
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Jameson, L. S. (Leander Starr), 1853-1917
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Gaetano Chierici - Public Domain
Chierici, Gaetano, 1838-1920
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unknown - Public Domain
Nathan, Isaac, 1792-1864
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Acscosta - CC BY-SA 3.0
Salazar, Abel, 1889-1946
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Harris & Ewing - Public Domain
Bickett, Thomas Walter, 1869-1921
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Evans, Walter, 1842-1923
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Bligh, William, 1754-1817
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Hilldring, John H. (John Henry), 1895-1974
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pseudonymous (Adolf Eckstein's Verlag) - Public Domain
Fraenkel, Eugen, 1853-1925
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Derby, George Horatio, 1823-1861
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unknown - Public Domain
Fine, Henry B. (Henry Burchard), 1858-1928
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Heyse, Paul, 1830-1914