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unknown - Public Domain
Michael Bednarek - CC BY-SA 4.0
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National Archives and Records Administration, identifier #12170786 (local identifier #64-NA-2352a-c) - Public Domain
#if:22785954@N08 - CC BY-SA 2.0
Joseph Kriehuber - Public Domain
Markus Siedler (1870-1938) - Public Domain
Lebrsm - CC BY-SA 4.0
Not listed - Public Domain
Photographer unidentified - Public Domain
Abdoozy - CC BY-SA 3.0
Benjamin Amure - CC BY-SA 2.0
Bain News Service, publisher - Public Domain
Rob Mieremet - CC BY-SA 3.0
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unknown - Public Domain
Gardner, Booth
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Pasini, Alberto, 1826-1899
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Gans, Eduard, 1797-1839
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Salk, Jonas Edward, 1914-1995
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Pastor, Ludwig, Freiherr von, 1854-1928
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Michael Bednarek - CC BY-SA 4.0
Mauceri, John
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Raimbach, Abraham, 1776-1843
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Lomami-Tshibamba, Paul, 1914-1985
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National Archives and Records Administration, identifier #12170786 (local identifier #64-NA-2352a-c) - Public Domain
Posner, Ernst.
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Tooke, William, 1744-1820
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#if:22785954@N08 - CC BY-SA 2.0
Duchaussoy, Michel, 1938-2012
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Joseph Kriehuber - Public Domain
Böhm, Joseph, 1795-1876
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Markus Siedler (1870-1938) - Public Domain
Gerlich, Fritz
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Pearse, Pádraic (1879-1916).
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Langford, Sam, 1883-1956
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Lebrsm - CC BY-SA 4.0
Griffiths, John W. (John Willis), 1809-1882
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Not listed - Public Domain
Jeffries, James J., 1875-1953
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Woolsey, Melancthon B. (Melancthon Brooks), 1817-1874
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Bravo Murillo, Juan, 1803-1873
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Photographer unidentified - Public Domain
Shouse, Catherine Filene, 1896-1994
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Colton, J. H. (Joseph Hutchins), 1800-1893
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Abdoozy - CC BY-SA 3.0
Jones, Mick, 1944-
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unknown - Public Domain
Nelson, N. O. (Nelson Oliver), 1844-1922
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Benjamin Amure - CC BY-SA 2.0
Parker, Evan
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Heysham, John, 1753-1834
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Shoval, Zalman, 1930-
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Bain News Service, publisher - Public Domain
Gould, Edwin, 1866-1933
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unknown - Public Domain
Irwin, Will, 1873-1948
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Pushman, Hovsep T., 1877-1966
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Rob Mieremet - CC BY-SA 3.0
Jong, Ate de, 1953-