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unknown - Public Domain
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Photograph in the John F. Kennedy Presidential Library and Museum, Boston. - Public Domain
Anonymous - Public Domain
Gage Skidmore - CC BY-SA 3.0
Frederick Christian Lewis Sr, after George Richmond - Public Domain
Public Domain
Morton L. Schamberg (1881-1918) - Public Domain
From Volume IV of 1908's "Men of Mark in Connecticut" edited by Norris Galpin Osborn (who died in 1932) - Public Domain
Georges Rousse - CC BY-SA 4.0
Uncredited - Public Domain
Haijin - CC BY 2.5
*:File:Otto_Struve_US_post_1949.JPG - Public Domain
Bain - Public Domain
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Meech, Thomas Cox
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unknown - Public Domain
Caffey, Francis G. (Francis Gordon), 1868-
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Opie, Amelia, 1769-1853
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Widtsoe, John Andreas, 1872-1952
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Percy, Benjamin
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Photograph in the John F. Kennedy Presidential Library and Museum, Boston. - Public Domain
Freeman, Orville L.
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Albareda, José Luis 1828-1897
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Anonymous - Public Domain
Cotogni, Antonio, 1831-1918
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Haraszthy, Agoston, 1812-1869
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Gage Skidmore - CC BY-SA 3.0
Villeneuve, Denis, 1967-....
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Melville, George Melville, Earl of, 1634?-1707
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Frederick Christian Lewis Sr, after George Richmond - Public Domain
Acland, Thomas Dyke, Sir, 1809-1898
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Behn, Aphra, 1640-1689
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Public Domain
Christoffel, Elwin Bruno, 1829-1900
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Desfontaines, René Louiche, 1750-1833
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Morton L. Schamberg (1881-1918) - Public Domain
Schamberg, Morton Livingston, 1881-1918
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From Volume IV of 1908's "Men of Mark in Connecticut" edited by Norris Galpin Osborn (who died in 1932) - Public Domain
Bishop, William D. (William Darius), 1827-1904
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Turner, William, 1761-1859
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Hulke, John Whitaker 1830-1895
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Georges Rousse - CC BY-SA 4.0
Rousse, Georges, 1947-....
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Uncredited - Public Domain
Hoyt, Helen
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Krebsbach, Eduard
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Rayer, Pierre-François-Olive, 1793-1867
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Fisher, Charles, 1816-1891
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Jansson, Eugène 1862-1915
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Haijin - CC BY 2.5
Moore, Lenard D., 1958-
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*:File:Otto_Struve_US_post_1949.JPG - Public Domain
Struve, Otto, 1897-1963
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Bain - Public Domain
Kirchwey, George W. (George Washington), 1855-1942
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Frank, Johann Peter, 1745-1821
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Ord, William M. (William Miller), 1834-1902