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unknown - Public Domain
anonymous - Public Domain
http://en.wikipedia.org/wiki/Image:Gordon_Zubrod.jpg - Public Domain
George Perkins Merrill (redrawn from C. Weber) - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Avronj - CC BY-SA 4.0
Thomon - Public Domain
Emery Walker - Public Domain
Brady-Handy Photograph Collection - Public Domain
Work for hire owned by Lent - Public Domain
Phd0 - CC BY-SA 3.0
Laura Kolb - CC BY 2.0
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Thayer, Nathaniel, 1808-1883
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Baly, William, 1814-1861
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unknown - Public Domain
Sirmen, Maddalena Laura Lombardini, 1745-1818
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anonymous - Public Domain
Whitaker, John T. (John Thompson), 1906-
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http://en.wikipedia.org/wiki/Image:Gordon_Zubrod.jpg - Public Domain
Zubrod, C. Gordon (Charles Gordon), 1914-1999
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Ferretti, Giovanni Domenico, 1692-1768
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Akkeringa, Johannes Evert Hendrik, 1861-1942
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George Perkins Merrill (redrawn from C. Weber) - Public Domain
Jackson, Charles T. (Charles Thomas), 1805-1880
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Post, Frans Jansz, 1612?-1680
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Mathew Brady Levin Corot Handy - Public Domain
MacVeagh, Wayne, 1833-1917
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Devine, Samuel L. (Samuel Leeper), 1915-1997
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unknown - Public Domain
Trudeau, Edward Livingston, 1848-1915
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Stephens, John Walter, 1834-1870
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Avronj - CC BY-SA 4.0
Peres, Asher, 1934-....
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Burke, Robert O'Hara, 1821-1861
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Cecil of Chelwood, Robert Gascoyne-Cecil, Viscount, 1864-1958
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Fiorilli, Tiberio, 1608-1694
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Shute, Josias, 1588-1643
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Elsheimer, Adam, 1578-1610
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Thomon - Public Domain
Cremonesi, Carlo
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Walsh, Edmund A. (Edmund Aloysius), 1885-1956
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Ramis, Harold
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Emery Walker - Public Domain
Allingham, William, 1824-1889
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Brady-Handy Photograph Collection - Public Domain
Claiborne, Nathaniel Herbert, 1777-1859
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Work for hire owned by Lent - Public Domain
Lent, Norman, 1931-2012
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Phd0 - CC BY-SA 3.0
Berteloot, Jean-Yves
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Laura Kolb - CC BY 2.0
Tate, Buddy
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Woodville, William, 1752-1805
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Brayer, Yves, 1907-1990
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Grönemeyer, Herbert, 1956-