Image from Wikimedia Commons
Eligio Ancona del Castillo -
unknown - Public Domain
Ray Jones, Universal Photo. - Public Domain
Willy Pogany - Public Domain
J. P. Trap - Public Domain
Georges Biard - CC BY-SA 3.0
Office of the Surgeon General - Public Domain
Public Domain
Cover credit: O. J. Jordan - Public Domain
Mathew Brady (1822-1896) and Levin C. Handy (1855-1932). - Public Domain
"Mishkin Photo" (Bain News Service, publisher) - Public Domain
United States Government - Public Domain
Esoiss - CC BY-SA 4.0
Henry Hering (1814-1893) - Public Domain
Agence Meurisse -
Image from Wikimedia Commons
Earp, Virgil, -1905
Image from Wikimedia Commons
Moore, John, Sir, 1761-1809
Image from Wikimedia Commons
Eligio Ancona del Castillo -
Ancona, Eligio, 1836-1893
Image from Wikimedia Commons
unknown - Public Domain
Edwards, Arthur, 1834-1901
Image from Wikimedia Commons
Ray Jones, Universal Photo. - Public Domain
House, Billy, 1890-1961
Image from Wikimedia Commons
unknown - Public Domain
Draper, Wickliffe
Image from Wikimedia Commons
Willy Pogany - Public Domain
Pogány, Willy, 1882-1955
Image from Wikimedia Commons
unknown - Public Domain
Mol, Leo, 1915-2009
Image from Wikimedia Commons
J. P. Trap - Public Domain
Huitfeldt, Arild, 1546-1609
Image from Wikimedia Commons
Georges Biard - CC BY-SA 3.0
Balasko, Josiane
Image from Wikimedia Commons
Office of the Surgeon General - Public Domain
Forwood, W. H. (William Henry), 1838-1915
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Public Domain
Spilhaus, Athelstan
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Rousset de Missy, Jean, 1686-1762
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Hoffa, Portland
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Hamer, Thomas Lyon, 1800-1846
Image from Wikimedia Commons
Cover credit: O. J. Jordan - Public Domain
Johnson, Hugh S. (Hugh Samuel), 1882-1942
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Gaulli, Giovanni Battista, 1639-1709
Image from Wikimedia Commons
Mathew Brady (1822-1896) and Levin C. Handy (1855-1932). - Public Domain
Steele, William Randolph, 1842-1901
Image from Wikimedia Commons
"Mishkin Photo" (Bain News Service, publisher) - Public Domain
Melis, Carmen, 1885-1967
Image from Wikimedia Commons
Fuentes, Gregorio, 1897-
Image from Wikimedia Commons
Froben, Johann, -1527
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Gellert, Christian Fürchtegott, 1715-1769
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Public Domain
Douglas, William Robert Keith, approximately 1783-1859
Image from Wikimedia Commons
Frothingham, Louis Adams, 1871-1928
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United States Government - Public Domain
Dies, Martin, 1900-1972
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Menzies, Pattie, Dame, 1899-1995
Image from Wikimedia Commons
Esoiss - CC BY-SA 4.0
Soisson, Jacques, 1928-
Image from Wikimedia Commons
Henry Hering (1814-1893) - Public Domain
Nightingale, Florence, 1820-1910
Image from Wikimedia Commons
Agence Meurisse -
Carco, Françis, 1886-1958
Image from Wikimedia Commons
Bleeker, P. (Pieter), 1819-1878