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David Shankbone - CC BY 3.0
George R. Lawrence Co., Chicago. - Public Domain
John Vanderlyn - Public Domain
unknown - Public Domain
Vasil Chlaidze - Public Domain
unknown -
Ken Gallager - Public Domain
Tom Marcello - CC BY-SA 2.0
Photographer unknown, included by Robert Logan Jack (subject of photo) in his book without attribution - Public Domain
GFHund - CC BY 3.0
Jazzpictures.it - Public Domain
Unknown, Lowell ObservatoryDisputed fact - CC BY-SA 4.0
U.S. Government Printing Office. - Public Domain
US Gov - Public Domain
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David Shankbone - CC BY 3.0
Joel, Billy, 1949-
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Zhivkov, Todor
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George R. Lawrence Co., Chicago. - Public Domain
Mucha, Alphonse, 1860-1939
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John Vanderlyn - Public Domain
Hasbrouck, Abraham Bruyn, 1791-1879
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unknown - Public Domain
Benedict XV, Pope, 1854-1922
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Vasil Chlaidze - Public Domain
Tabiże, Galaktion 1892-1959
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Cooper, Susan Fenimore, 1813-1894
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De Chair, Dudley Rawson Stratford, Sir, 1864-
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unknown -
Haro, Francisco de, 1792-1848
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unknown - Public Domain
Baker, Purley Albert, 1858-1924
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Talvela, Martti
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Andrews, Eliza Frances, 1840-
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Price, E. Hoffmann
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Phelps, Myron H. (Myron Henry), 1856-1916
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Ken Gallager - Public Domain
Hunt, Jonathan, 1787-1832
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Tom Marcello - CC BY-SA 2.0
Jones, Elvin.
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Photographer unknown, included by Robert Logan Jack (subject of photo) in his book without attribution - Public Domain
Jack, Robert Logan, 1845-1921
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Forman, H. Buxton (Harry Buxton), 1842-1917
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Friese-Greene, William, 1855-1921
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Haidar Ali, Nawab of Mysore, approximately 1722-1782
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GFHund - CC BY 3.0
Bieberbach, Ludwig, 1886-1982
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Sparks, Edwin Erle, 1860-1924
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Pope, Jack, 1913-
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Tugwell, Rexford G. (Rexford Guy), 1891-1979
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Monro, Thomas, 1759-1833
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Cipriani, Giovanni Battista, 1727-1785
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Jazzpictures.it - Public Domain
Callender, Red
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Unknown, Lowell ObservatoryDisputed fact - CC BY-SA 4.0
Slipher, Vesto Melvin, 1875-1969
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U.S. Government Printing Office. - Public Domain
Allen, Amos L. (Amos Lawrence), 1837-1911
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US Gov - Public Domain
Sternberg, George Miller, 1838-1915