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unknown - Public Domain
PH1 Nelson Archey - Public Domain
Michael, Charles D - Public Domain
Rob C. Croes / Anefo -
SIGMA PROJECT - CC BY 2.0
Josh McAllister - CC BY 2.0
Langdon Mitchell. No image credit - Public Domain
Courtesy Reagan Library, PD - Public Domain
National Art Committee Metropolitan Museum of Art (New York, N.Y.) - Public Domain
Public Domain
Maryother - CC BY-SA 4.0
after Cornelis Janssens van Ceulen - Public Domain
Félix Vallotton - Public Domain
LSE Library -
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Ashkenazy, Vladimir, 1937-....
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Bartley, M. (Mordecai), 1783-1870
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unknown - Public Domain
Maxcy, Jonathan, 1768-1820
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Richmond, Charles Lennox, Duke of, 1672-1723
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PH1 Nelson Archey - Public Domain
Macapagal, Diosdado, 1910-1997
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unknown - Public Domain
Booth-Tucker, Emma, 1860-1903
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Sirmay, Albert.
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Michael, Charles D - Public Domain
Hannington, James, 1847-1885
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Van Flandern, Tom, 1940-2009
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Rob C. Croes / Anefo -
Constantine, Eddie, 1917-1993
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Rowland, Dunbar, 1864-1937
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Cushman, Susan, 1822-1859
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SIGMA PROJECT - CC BY 2.0
Pablo, Luis de
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Teague, Lewis
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Josh McAllister - CC BY 2.0
Midori, 1971-
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Langdon Mitchell. No image credit - Public Domain
Mitchell, Langdon Elwyn, 1862-1935
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Duncan of Camperdown, Adam Duncan, Viscount, 1731-1804
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Courtesy Reagan Library, PD - Public Domain
Marshall, Brenda, 1915-1992
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National Art Committee Metropolitan Museum of Art (New York, N.Y.) - Public Domain
Hopkinson, Charles, 1869-1962
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unknown - Public Domain
Paynter, Thomas H. (Thomas Hanson), 1851-1921
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Public Domain
Pizarro, Gonzalo, -1548
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Howe, Henry, 1816-1893
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Public Domain
Ascher, Joseph
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Maryother - CC BY-SA 4.0
Sciola, Pinuccio, 1942-....
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after Cornelis Janssens van Ceulen - Public Domain
Digges, Dudley, Sir, 1583-1639
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Brown, Sydney M. (Sydney MacGillvary), 1895-1952
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unknown - Public Domain
Esmarch, Friedrich von 1823-1908
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Félix Vallotton - Public Domain
Bataille, Henry, 1872-1922
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LSE Library -
Rathbone, Eleanor F. (Eleanor Florence), 1872-1946
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unknown - Public Domain
Hornbostel, Henry, 1867-1961