Image from Wikimedia Commons
Charles Cromwell Ingham (1796-1863) - Public Domain
Ray Jones, Universal Photo. - Public Domain
Unknown military photographer of the Signal Corps - Public Domain
Internet Archive Book Images -
Zimin.V.G. - CC BY-SA 3.0
Unknown - Public Domain
Public Domain
NBC Blue Network - Public Domain
unknown - Public Domain
Charles H. (Charles Henry) Mockridge (1844-1913) - Public Domain
GPO photographer - Public Domain
Onehandclapping - CC BY-SA 3.0
Image from Wikimedia Commons
Charles Cromwell Ingham (1796-1863) - Public Domain
Drowne, Solomon, 1753-1834
Image from Wikimedia Commons
Ray Jones, Universal Photo. - Public Domain
House, Billy, 1890-1961
Image from Wikimedia Commons
Pease, Alfred E. (Alfred Edward), Sir, 1857-1939
Image from Wikimedia Commons
Unknown military photographer of the Signal Corps - Public Domain
Marshall, S.L.A. (Samuel Lyman Atwood), 1900-1977
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Abel-Smith, Brian, 1926-1996
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Hanna, Louis B. (Louis Benjamin), 1861-1948
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Pauli, Wolfgang, 1900-1958
Image from Wikimedia Commons
Internet Archive Book Images -
Furness, William Henry, 1802-1896
Image from Wikimedia Commons
Zimin.V.G. - CC BY-SA 3.0
Breuer, Lee
Image from Wikimedia Commons
Wills, Thomas, 1740-1802
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Unknown - Public Domain
Bose, Subhas Chandra, 1897-1945
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Weld, Thomas, 1773-1837
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Sasaki, Nobutsuna, 1872-1963
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Farquharson, Robert, 1836-1918
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Spencer, Charles Robert Spencer, Earl, 1857-1922
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Public Domain
Leslie, Eliza, 1787-1858
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Castro, José, 1807-1860
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Hardinge of Penshurst, Charles Hardinge, Baron, 1858-1944
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Phoenix, River
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NBC Blue Network - Public Domain
Wheeler, Bert, 1895-1968
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unknown - Public Domain
Margareta, Crown Princess of Sweden, 1882-1920
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Norstad, Lauris, 1907-1988
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Hertz, Gustav, 1887-
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Calvert, Ken, 1953-
Image from Wikimedia Commons
Charles H. (Charles Henry) Mockridge (1844-1913) - Public Domain
Hellmuth, I. (Isaac), 1817-1901
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unknown - Public Domain
Singer, Isidore, 1859-1939
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unknown - Public Domain
Bihrangī, Ṣamad
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Public Domain
King, P. J. Locke (Peter John Locke), 1811-1885
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GPO photographer - Public Domain
Impellitteri, Vincent R. (Vincent Richard), 1900-1987
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Onehandclapping - CC BY-SA 3.0
Hollo, Anselm.