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unknown - Public Domain
film screenshot (RKO Pictures) - Public Domain
Photo not credited in any obvious way - Public Domain
SAndic -
gildas_f - CC BY 2.0
Reshmi470 - CC BY-SA 4.0
Rob Mieremet (ANEFO) - CC BY-SA 3.0
Hendrick Goltzius - Public Domain
*:File:Giancarlo_Esposito.jpg - CC BY 2.0
Willem van Haecht - Public Domain
United States Navy - Public Domain
tsaetre - CC BY-SA 4.0
Part of Arnold Thomas boxing collection [picture] - Public Domain
Haukurth - CC BY-SA 3.0
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Public Domain
Mason, Stevens Thomson, 1811-1843
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unknown - Public Domain
Milner, Isaac, 1750-1820
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film screenshot (RKO Pictures) - Public Domain
Noonan, Tommy, 1921-1968
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Walke, Henry, 1808-1896
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Bauernfeind, Gustav, 1848-1904
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Pritt, D. N. (Denis Nowell), 1887-1972
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Briquet, John, 1870-1931
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Photo not credited in any obvious way - Public Domain
McGraw, John Harte, -1910
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SAndic -
Reiss, Vivian, 1952-
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gildas_f - CC BY 2.0
Aérosol, Jef
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unknown - Public Domain
Davis, Cushman Kellogg, 1838-1900
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unknown - Public Domain
Seashore, Carl E. (Carl Emil), 1866-1949
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Fenton, Mr. (Richard), 1746-1821
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Reshmi470 - CC BY-SA 4.0
Flory, Paul J.
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Astle, Thomas, 1735-1803
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Rob Mieremet (ANEFO) - CC BY-SA 3.0
Tinbergen, Niko, 1907-1988
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Hendrick Goltzius - Public Domain
Lampsonius, Dominicus, 1532-1599
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*:File:Giancarlo_Esposito.jpg - CC BY 2.0
Esposito, Giancarlo
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Willem van Haecht - Public Domain
Haecht, Willem van 1593-1637
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United States Navy - Public Domain
Crose, W. M. (William Michael), 1867-1929
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Giovanni d'Andrea, approximately 1270-1348
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tsaetre - CC BY-SA 4.0
Chestnut, Cyrus
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Trainor, Bernard E., 1928-...
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Stewart, Paul, 1908-1986
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Part of Arnold Thomas boxing collection [picture] - Public Domain
Carruthers, Jimmy, 1929-1990
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Mathews, Kerwin
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Young, Robert N. (Robert Nicholas), 1900-1964
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Haukurth - CC BY-SA 3.0
Hilmarsson, Hilmar Örn.
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O'Rorke, Patrick Henry, 1836-1863
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Merian, Maria Sibylla, 1647-1717