Image from Wikimedia Commons
Rudolf Dührkoop - Public Domain
unknown - Public Domain
Astrochemist - Public Domain
Engraving by James Watson, after unknown artist[http://www.npg.org.uk/collections/search/portrait/mw200120/Sir-John-Trenchard?LinkID=mp56674&role=sit&rNo=0] - Public Domain
United States government consulate in Amsterdam, the Netherlands - Public Domain
US Government Printing Office - Public Domain
David McNeese - CC BY-SA 3.0
author - Public Domain
Commonwealth Department of Information -
probably :en:James Murray (biologist) - Public Domain
en - Public Domain
Michael Cohn - CC BY-SA 2.0
unknown -
Image from Wikimedia Commons
Tōgō, Heihachirō, 1848-1934
Image from Wikimedia Commons
George, of Trebizond, 1396-1486
Image from Wikimedia Commons
Rorer, Posey 1892-1936
Image from Wikimedia Commons
Rudolf Dührkoop - Public Domain
Hellmann, G.
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Ferré, Léo, 1916-1993
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unknown - Public Domain
Douglas, Charlie, 1840-1916
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Vladimiroff, Pierre, 1893-1970
Image from Wikimedia Commons
Astrochemist - Public Domain
Coblentz, Catherine Cate, 1897-1951
Image from Wikimedia Commons
Engraving by James Watson, after unknown artist[http://www.npg.org.uk/collections/search/portrait/mw200120/Sir-John-Trenchard?LinkID=mp56674&role=sit&rNo=0] - Public Domain
Trenchard, John, Sir, 1640-1695
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Karasz, Mariska, 1898-1960
Image from Wikimedia Commons
United States government consulate in Amsterdam, the Netherlands - Public Domain
Minner, Ruth Ann, 1935-2021
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Dagostino, Gigi
Image from Wikimedia Commons
US Government Printing Office - Public Domain
Gill, Thomas P. (Thomas Ponce), 1922-2009
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David McNeese - CC BY-SA 3.0
Nelson, Donna J., 1954-
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author - Public Domain
Fagan, James Fleming, 1828-1893
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Marsh, Narcissus, 1638-1713
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Commonwealth Department of Information -
Alice, Duchess of Gloucester, 1901-2004
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Forrest, Theodosius, 1728-1784
Image from Wikimedia Commons
probably :en:James Murray (biologist) - Public Domain
Marshall, Eric (Eric Stewart), 1879-1963
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unknown - Public Domain
Pinkham, Lydia Estes, 1819-1883
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McEvoy, Ambrose, 1878-1927
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unknown - Public Domain
Smith, Lucy, 1775-1856
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Has, Wojciech J. (Wojciech Jerzy), 1925-2000
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en - Public Domain
Little Wolf, -1904
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Baeck, Leo, 1873-1956
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Michael Cohn - CC BY-SA 2.0
Laine, Cleo
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Grillparzer, Franz, 1791-1872
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Debenedetti, Salvador, 1884-1930
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Péguy, Charles, 1873-1914
Image from Wikimedia Commons
unknown -
Mayer, Carl, 1894-1944