Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
unknown - Public Domain
Worker Station - CC BY 2.0
unattributed - Public Domain
Jollyroger & Frieda -
Art-O-Graph Film Company / Arrow Film Corporation - Public Domain
in a book by Artur James Mason published in 1912 - CC0 1.0
original uploader - Public Domain
Public Domain
Gage Skidmore - CC BY-SA 3.0
Melesse - Public Domain
(...) Punt / Anefo -
C. M. Stieglitz, World Telegram staff photographer - Public Domain
Frank Opinions - CC BY-SA 4.0
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Patterson, George Washington, 1799-1879
Image from Wikimedia Commons
unknown - Public Domain
Titus, Lydia Yeamans, 1866?-1929
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Beall, Reasin, 1769-1843
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Worker Station - CC BY 2.0
Kihuen, Ruben J. (Ruben Jesus), 1980-
Image from Wikimedia Commons
Ward, Samuel A., 1847-1903
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unattributed - Public Domain
Brownson, Willard H. (Willard Herbert), 1845-1935
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Harper, James Clarence, 1819-1890
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Ephrussi, Charles, 1849-1905
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Jollyroger & Frieda -
Moore, Terry, 1954-
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Avenarius, Richard, 1843-1896
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Malik, Charles Habib, 1906-1987
Image from Wikimedia Commons
Art-O-Graph Film Company / Arrow Film Corporation - Public Domain
Cobb, Edmund, 1892-1974
Image from Wikimedia Commons
in a book by Artur James Mason published in 1912 - CC0 1.0
Collins, William Edward, 1867-1911
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unknown - Public Domain
Prado, Mariano Ignacio, 1826-1902
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Rosendahl, Charles E. (Charles Emery), 1892-1977
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unknown - Public Domain
Lejeune Dirichlet, Peter Gustav, 1805-1859
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Douglas, C.H. (Clifford Hugh), 1879-1952
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original uploader - Public Domain
Rainey, Paul James, 1877-1923
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Public Domain
Kelley, Edgar Stillman, 1857-1944
Image from Wikimedia Commons
Gage Skidmore - CC BY-SA 3.0
Anderson, Paul, 1965-....
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Melesse - Public Domain
Espinosa, Eden
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unknown - Public Domain
Rennie, George, 1791-1866
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Vesque von Püttlingen, Johann, 1803-1883
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Kirke, Percy, 1646?-1691
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Galle, Johann Gottfried, 1812-1910
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(...) Punt / Anefo -
Oltmans, Willem L.
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Struve, Hermann, 1854-1920
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C. M. Stieglitz, World Telegram staff photographer - Public Domain
Post, Marjorie Merriweather, 1887-1973
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unknown - Public Domain
Le Clerc, Jean, 1657-1736
Image from Wikimedia Commons
Frank Opinions - CC BY-SA 4.0
Gardiner, Jeremy