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Public Domain
W. B. - Public Domain
unknown - Public Domain
Siebbi - CC BY 3.0
Drawn by [?].Alemand, engraved by W.C.Sharpe - Public Domain
Prayn4peace - CC BY-SA 3.0
Harris & Ewing - Public Domain
Snowded - CC0 1.0
ABC Television - Public Domain
artwork drawn by Adolph Boÿ, engraved by Jeremias Falck - Public Domain
Frederick Gutekunst - Public Domain
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
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Mccartney, Paul
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Le Maistre, Antoine, 1608-1658
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Kuper, Peter, 1958-....
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Struth, Thomas, 1954-....
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Public Domain
Wells, Erastus, 1823-1893
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Skidelsky, Robert, 1939-
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W. B. - Public Domain
Martin, Henri, 1860-1943
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unknown - Public Domain
Dodds, Johnny, 1892-1940
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Hobsbawm, E. J. (Eric J.), 1917-
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Siebbi - CC BY 3.0
Winterbottom, Michael
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Nelson, Tim Blake
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Cherwell, Frederick Alexander Lindemann, Viscount, 1886-1957
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Public Domain
Bennett, Clarence Edmund, 1833-1902
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Drawn by [?].Alemand, engraved by W.C.Sharpe - Public Domain
Mitscherlich, Eilhard, 1794-1863
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unknown - Public Domain
Chase, George C. (George Colby), 1844-1919
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Prayn4peace - CC BY-SA 3.0
Wexler, Haskell
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Rojas Paúl, Juan Pablo, 1826-1905
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Mason, Hugh, 1820-1886
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Herglotz, Gustav, 1881-1953
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Earle, John, 1601?-1665
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Harris & Ewing - Public Domain
Chambers, William Lea, 1852-
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Snowded - CC0 1.0
Owen, Daniel, 1836-1895
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ABC Television - Public Domain
Conrad, Robert, 1935-
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artwork drawn by Adolph Boÿ, engraved by Jeremias Falck - Public Domain
Alhazen, 965-1039
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Frederick Gutekunst - Public Domain
Goodell, William, 1829-1894
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Pearce, George Foster, 1870-1952
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Salomon, Alice, 1872-1948
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Kops, Jan, 1765-1849
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Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Booker, George William, 1821-1883
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Public Domain
Bendire, Charles, 1836-1897