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Kzirkel - CC BY-SA 3.0
Tom Marcello - CC BY-SA 2.0
Engraving by Francis Holl - Public Domain
Sumori - CC BY-SA 3.0
SilasFlannery - CC BY-SA 4.0
Norris Galpin Osborn (1858-1932). - Public Domain
Emmanuel Yashchin - Public Domain
Anders Zorn - Public Domain
Gps909 - CC BY-SA 3.0
Unidentified photographer - Public Domain
Unknown, possibly a self portrait - Public Domain
Laurayukiko - CC BY-SA 4.0
U.S. Government - Public Domain
Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) - CC BY 3.0
Glyn Warren Philpot RA (5 October 1884 – 16 December 1937) - Public Domain
U.S. Government Printing Office - Public Domain
anonymous -
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Rittenhouse, David, 1732-1796
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Pinchot, Rosamond, 1904-1938
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Kzirkel - CC BY-SA 3.0
Cooper, Leon Neal, 1930-
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Tom Marcello - CC BY-SA 2.0
Jones, Elvin.
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Engraving by Francis Holl - Public Domain
Hardinge, Henry Hardinge, Viscount, 1785-1856
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Sumori - CC BY-SA 3.0
Porter, George, Jr.
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Cunningham, Allan, 1784-1842
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SilasFlannery - CC BY-SA 4.0
Nordenstrom, Gladys, 1924-
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Norris Galpin Osborn (1858-1932). - Public Domain
Weeks, Frank B., 1854-1935
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Emmanuel Yashchin - Public Domain
Koczÿ, Rosemarie, 1939-2007
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Mahlasela, Vusi
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Anders Zorn - Public Domain
Zorn, Anders, 1860-1920
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Gps909 - CC BY-SA 3.0
Simpson, Keith, 1907-1985
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Unidentified photographer - Public Domain
Leroux, Xavier, 1863-1919
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Lehmann, Lotte
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Unknown, possibly a self portrait - Public Domain
Watson, Edith S., 1861-1943
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Laurayukiko - CC BY-SA 4.0
Benise (Musician)
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Priuli, Girolamo, -1567
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Hoare, William, 1707-1792
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Hyde, Douglas, 1860-1949
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U.S. Government - Public Domain
Truax, Robert Collins, 1917-2010
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Oxford, Edward de Vere, Earl of, 1550-1604
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Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) - CC BY 3.0
Hengel, Martin
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Fazenda, Louise, 1895-1962
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Perkin, William Henry, Sir, 1838-1907
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Gohier, Louis-Jérôme, 1746-1830
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Merian, Maria Sibylla, 1647-1717
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Glyn Warren Philpot RA (5 October 1884 – 16 December 1937) - Public Domain
Cox, E. H. M. (Euan Hillhouse Methven), 1893-
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U.S. Government Printing Office - Public Domain
Gilbert, Jacob H., 1920-1981
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anonymous -
Laban, Rudolf von, 1879-1958.