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unknown - Public Domain
Viets, H. R. - CC BY 4.0
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BrokenSphere - CC BY-SA 3.0
Gerhard51 - Public Domain
Karoli - CC BY-SA 2.0
Elisa Cabot - CC BY-SA 2.0
Frank Saptel - CC BY 2.0
unknown photographer - Public Domain
Public Domain
Bain - Public Domain
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unknown - Public Domain
Wharton, Gabriel Colvin, 1824-1906
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Drouot, Antoine, 1774-1847
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King, D. Ward
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Dickson, Samuel Henry, 1798-1872
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Viets, H. R. - CC BY 4.0
Bigelow, Jacob, 1786-1879
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Dill, Clarence C. (Clarence Cleveland), 1884-1978
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Douglas, T.C. (Thomas Clement), 1904-1986
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Hatch, Israel T. (Israel Thompson), 1808-1875
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Murphy, Matt (Guitarist)
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Jacob, John J. (John Jeremiah), 1829-1893
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BrokenSphere - CC BY-SA 3.0
Chan, Ernie
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Pauley, Jane, 1950-
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Gerhard51 - Public Domain
Davies, Fanny, 1861-1934
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Hofer, Andreas, 1767-1810
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Karoli - CC BY-SA 2.0
Dunbar, Aynsley
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Sully, Maximilien de Béthune, duc de, 1559-1641
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Elisa Cabot - CC BY-SA 2.0
García Ponce, Juan.
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Frank Saptel - CC BY 2.0
McLaughlin, Audrey, 1936-
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Smoluchowski, Marian, 1872-1917
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Thynne, Anna, 1806-1866
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unknown photographer - Public Domain
Asplund, Karl, 1890-
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Schelling, Friedrich Wilhelm Joseph von 1775-1854
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Smith, Preserved, 1880-1941
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Brown, Hank, 1940-
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Hart, Solomon Alexander, 1806-1881
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Kudlich, Hans, 1823-1917
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Bakhmetev, B. A. (Boris Aleksandrovich)
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Christopherson, Peter
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Milner, Alfred Milner, Viscount, 1854-1925
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Bain - Public Domain
Pearson, E. J., 1863-1928