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unknown - Public Domain
LazyFan - CC BY 3.0
Tom Marcello - CC BY-SA 2.0
U.S. DoD - Public Domain
Quentin Olbrechts - CC BY-SA 3.0
Unknown author -
Mariusz Kubik, http://www.mariuszkubik.pl - CC BY-SA 3.0
Henry L. Chase - Public Domain
Travis Puderbaugh - CC BY-SA 2.5
Smithsonian American Art Museum. - Public Domain
by and published by William Say, after John Hoppner - Public Domain
Praemium Erasmianum Foundation - CC BY-SA 4.0
GFHund - CC BY 3.0
From a portrait by John Collier - Public Domain
Unknown Oberthur collection - Public Domain
George Grantham Bain Collection (Library of Congress) - Public Domain
Monroem - CC BY-SA 3.0
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unknown - Public Domain
Barral, J. A. (Jean Augustin), 1819-1884
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Pollard, William G. (William Grosvenor), 1911-1989
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Lim, Bo Seng, 1909 -1944
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LazyFan - CC BY 3.0
Seers, Dudley.
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Mann, William M., 1886-1960
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Tom Marcello - CC BY-SA 2.0
Vick, Harold, 1936-1987
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U.S. DoD - Public Domain
Mandrell, Barbara.
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Mir, Pedro
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Quentin Olbrechts - CC BY-SA 3.0
Samyn, Philippe, 1948-
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Unknown author -
Ashe, W. W. (William Willard), 1872-1932
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Mörike, Eduard, 1804-1875
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MacDonald, Malcolm, 1901-1981
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MacLafferty, James H. (James Henry), 1871-1937
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Cook, George S. (George Smith), 1819-1902
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Mariusz Kubik, http://www.mariuszkubik.pl - CC BY-SA 3.0
Ficowski, Jerzy
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Henry L. Chase - Public Domain
Ii, John Papa
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Travis Puderbaugh - CC BY-SA 2.5
Sweeney, Julia
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Smithsonian American Art Museum. - Public Domain
Hancock, Walker Kirtland, 1901-1998
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Passavant, Johann David, 1787-1861
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by and published by William Say, after John Hoppner - Public Domain
Grenville, Thomas, 1755-1846
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Praemium Erasmianum Foundation - CC BY-SA 4.0
Clark, Grahame, 1907-1995
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Wellington, Arthur Wellesley, Duke of, 1769-1852
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Young, Loretta, 1913-2000
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GFHund - CC BY 3.0
Goldhaber, Maurice, 1911-2011
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From a portrait by John Collier - Public Domain
Sandeman, Robert Groves, Sir, 1835-1892
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Unknown Oberthur collection - Public Domain
Guenée, A. (Achille), 1809-1880
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Neumann, Hanna
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Mavor, William Fordyce, 1758-1837
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George Grantham Bain Collection (Library of Congress) - Public Domain
Andrews, John B. (John Bertram), 1880-1943
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Monroem - CC BY-SA 3.0
Behar, Ruth, 1956-....