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Unknown (US Geological Survey) - Public Domain
publicity photo, author unknown - Public Domain
Menerbes - CC BY-SA 3.0
Georges Seguin (Okki - CC BY-SA 3.0
L. T. Meade - no photo credit. Hurst & Company Publishers - Public Domain
unknown -
MSRCambridge - CC BY-SA 4.0
anonymous - Public Domain
Contemporary portrait - Public Domain
original uploader - Public Domain
City of Green Bay - Public Domain
Al Aumuller, World-Telegram staff photographer - Public Domain
Public Domain
unknown - Public Domain
Гатерас - Public Domain
Staff Photographers - CC BY-SA 4.0
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Clarke, Edward, Sir, 1841-1931
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Paso, Juan José 1758-1833
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McCombs, James, 1873-1933
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Unknown (US Geological Survey) - Public Domain
Vaughan, Thomas Wayland, 1870-1952
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publicity photo, author unknown - Public Domain
Ashton, Algernon
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Menerbes - CC BY-SA 3.0
Bory, Jean-Louis, 1919-1979
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Seymour, Robert, 1798-1836
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Georges Seguin (Okki - CC BY-SA 3.0
Tardi, Jacques
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L. T. Meade - no photo credit. Hurst & Company Publishers - Public Domain
Meade, L. T., 1854-1914
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unknown -
Greshoff, Jan, 1888-1971
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MSRCambridge - CC BY-SA 4.0
Bishop, Christopher M.
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anonymous - Public Domain
Worthing, Frank, 1866-1910
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Contemporary portrait - Public Domain
Romaine, William, 1714-1795
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original uploader - Public Domain
Lane, Rose Wilder, 1886-1968
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City of Green Bay - Public Domain
Baird, Henry S. (Henry Samuel), 1800-1875
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Condé, Claire-Clémence de Maillé-Brézé, princesse de, 1628-1694
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Powell, W. R. H. (Walter Rice Howell), 1819-1889
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Al Aumuller, World-Telegram staff photographer - Public Domain
Hergesheimer, Joseph, 1880-1954
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Public Domain
Angell, James Burrill, 1829-1916
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unknown - Public Domain
Chasles, Philarète, 1798-1873
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Гатерас - Public Domain
City University of New York. City College
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Sienkiewicz, Henryk, 1846-1916
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Public Domain
Moore, Gabriel, approximately 1785-1845
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Scott, Fred Newton, 1860-1931
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Sherbrooke, Robert Lowe, Viscount, 1811-1892
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unknown - Public Domain
Hardin, Clifford M. (Clifford Morris), 1915-2010
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Bundy, Harvey Hollister, 1888-
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unknown - Public Domain
Hooker, Henry Clay, 1828-1907
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Staff Photographers - CC BY-SA 4.0
Barneby, Rupert C.
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Pastor, Ed, 1943-2018