Image from Wikimedia Commons
unknown - Public Domain
Jared and Corin - CC BY-SA 2.0
Giladrosenfelder - CC BY-SA 3.0
Étienne Carjat. Upload, stitch and restoration by Jebulon - Public Domain
user at project - Public Domain
user at project - CC BY-SA 3.0
Mises Institute - CC BY-SA 3.0
The Library of Congress -
original uploader - Public Domain
Philip Haas - Public Domain
Mathew Brady - Public Domain
Anonymous -
GRT Records - Public Domain
James Abbe (picture credit) - Public Domain
Tom Photos - CC BY-SA 4.0
Judorneles - CC BY-SA 3.0
Image from Wikimedia Commons
unknown - Public Domain
McCalla, Bowman Hendry, 1844-1910
Image from Wikimedia Commons
Jared and Corin - CC BY-SA 2.0
Curtis, Catie
Image from Wikimedia Commons
MacArthur, Arthur, 1815-1896
Image from Wikimedia Commons
Giladrosenfelder - CC BY-SA 3.0
Cohen, Jack, 1919-
Image from Wikimedia Commons
Étienne Carjat. Upload, stitch and restoration by Jebulon - Public Domain
Pailleron, Édouard, 1834-1899
Image from Wikimedia Commons
user at project - Public Domain
Sherman, Robert B.
Image from Wikimedia Commons
Colborne, John, Sir, 1778-1863
Image from Wikimedia Commons
user at project - CC BY-SA 3.0
Gach, Gary
Image from Wikimedia Commons
Mises Institute - CC BY-SA 3.0
Higgs, Robert
Image from Wikimedia Commons
The Library of Congress -
Stacy, Jess, 1904-1995
Image from Wikimedia Commons
original uploader - Public Domain
Viète, François, 1540-1603
Image from Wikimedia Commons
Dillingham, Benjamin Franklin, 1844-1918
Image from Wikimedia Commons
Philip Haas - Public Domain
Graves, W. J. (William Jordan), 1805-1848
Image from Wikimedia Commons
Fichte, Johann Gottlieb, 1762-1814
Image from Wikimedia Commons
Mathew Brady - Public Domain
Nelson, Samuel, 1792-1873
Image from Wikimedia Commons
Ludlow, Frank, 1885-1972
Image from Wikimedia Commons
Earp, Wyatt, 1848-1929
Image from Wikimedia Commons
Anonymous -
O'Malley, Walter F. (Walter Frank), 1903-1979
Image from Wikimedia Commons
Kimball, H. I. (Hannibal Ingalls), 1832-1895
Image from Wikimedia Commons
GRT Records - Public Domain
Ryles, John Wesley
Image from Wikimedia Commons
unknown - Public Domain
Bartlett, Sy, 1903-1978
Image from Wikimedia Commons
James Abbe (picture credit) - Public Domain
Winwood, Estelle, 1883-1984
Image from Wikimedia Commons
Heberden, William, 1710-1801
Image from Wikimedia Commons
unknown - Public Domain
Lord, Stanley, 1877-1962
Image from Wikimedia Commons
Tom Photos - CC BY-SA 4.0
Spann, Gloria Carter
Image from Wikimedia Commons
unknown - Public Domain
Barboncito, 1820-1871
Image from Wikimedia Commons
Dodd, William J.
Image from Wikimedia Commons
Öpik, Ernst Julius, 1893-
Image from Wikimedia Commons
Judorneles - CC BY-SA 3.0
Oiticica, Christina, 1951-
Image from Wikimedia Commons
Richepin, Jean, 1849-1926