Image from Wikimedia Commons
Carl Mydans - Public Domain
Garo (photographer) - Public Domain
Richard Avery - CC0 1.0
Michel starobinski - CC BY-SA 4.0
unknown - Public Domain
CERN - CC BY-SA 4.0
W. A. Retzer<ref name="Dear-Master-2004" /> - Public Domain
U.S. Army - Public Domain
Fritz Schueller (photographer) Amos.schueller - CC BY-SA 3.0
Duncan.france - CC BY-SA 3.0
US Government Printing Office - Public Domain
Sholomovich / Шоломович -
Random House Children's Books - CC BY-SA 3.0
unknown -
Hans Holbein d. J. - Public Domain
Stephencdickson - CC BY-SA 4.0
18th century portrait. Source is listed as the Library of Congress in Washington, D.C. - Public Domain
Image from Wikimedia Commons
Carl Mydans - Public Domain
Mydans, Shelley Smith
Image from Wikimedia Commons
Grivas, Geōrgios, 1898-1974
Image from Wikimedia Commons
Herter, Christian Archibald, 1865-1910
Image from Wikimedia Commons
Garo (photographer) - Public Domain
Scotti, Antonio, 1866-1936
Image from Wikimedia Commons
Richard Avery - CC0 1.0
Barlow, John B., 1924-
Image from Wikimedia Commons
Wyndham, Wadham, Sir, 1609-1668
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Russell of Killowen, Charles Russell, baron, 1832-1900
Image from Wikimedia Commons
Michel starobinski - CC BY-SA 4.0
Starobinski, Jean
Image from Wikimedia Commons
unknown - Public Domain
Hepburn, Mitchell Frederick, 1896-1953
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unknown - Public Domain
Johnson, Joseph French, 1853-1925
Image from Wikimedia Commons
CERN - CC BY-SA 4.0
Hove, L. van (Léon).
Image from Wikimedia Commons
W. A. Retzer<ref name="Dear-Master-2004" /> - Public Domain
Cocke, John Hartwell, 1780-1866
Image from Wikimedia Commons
U.S. Army - Public Domain
Cook, Gilbert R. (Gilbert Richard), 1889-1963
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Urquhart, Thomas, Sir, 1611-1660
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unknown - Public Domain
Robert-Hansen, Emil, 1860-1926
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Carnochan, J. M. (John Murray), 1817-1887
Image from Wikimedia Commons
Fritz Schueller (photographer) Amos.schueller - CC BY-SA 3.0
Gallizio, Pinot, 1902-1964
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Duncan.france - CC BY-SA 3.0
Alley, Rewi, 1897-1987
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unknown - Public Domain
Read, George C. (George Campbell), 1787-1862
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Johann Friedrich, Herzog von Württemberg und Teck, 1582-1628
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Butenandt, Adolf, 1903-
Image from Wikimedia Commons
US Government Printing Office - Public Domain
Thompson, Clark Wallace, 1896-1981
Image from Wikimedia Commons
Sholomovich / Шоломович -
Deĭneka, Aleksandr Aleksandrovich 1899-1969
Image from Wikimedia Commons
Random House Children's Books - CC BY-SA 3.0
Browne, Anthony, 1946-....
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unknown - Public Domain
Clark, Walter Eli, 1869-1950
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unknown -
Meech, Thomas Cox
Image from Wikimedia Commons
Hans Holbein d. J. - Public Domain
Gage, John, 1479-1556
Image from Wikimedia Commons
Lindsay, Norman, 1879-1969
Image from Wikimedia Commons
Stephencdickson - CC BY-SA 4.0
Duke-Elder, Stewart, 1898-1978
Image from Wikimedia Commons
18th century portrait. Source is listed as the Library of Congress in Washington, D.C. - Public Domain
Oswald, Eleazer, 1755-1795