Image from Wikimedia Commons
Compilation - Public Domain
Bureau of American Ethnography - Public Domain
Peter Lely - Public Domain
unknown - Public Domain
Karel van Mallery - Public Domain
Edward H. Hart, Detroit Publishing Company - Public Domain
Philkon - Public Domain
Alliefendrick - CC BY-SA 3.0
Cover credit: O. J. Jordan - Public Domain
Mathew Brady - Public Domain
Dan V. Smith - Public Domain
Stephen Pearce - Public Domain
Gage Skidmore - CC BY-SA 3.0
Inocybe - CC BY-SA 3.0
Public Domain
Image from Wikimedia Commons
Compilation - Public Domain
Germon, Euphemia, -1914
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Bureau of American Ethnography - Public Domain
Steward, Julian Haynes, 1902-1972
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Peter Lely - Public Domain
Holmes, Robert, Sir, 1622-1692
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Ciechanowiecki, Andrzej, 1924-2015
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Northumberland, Henry Percy, Earl of, 1564-1632
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Bloch, Ernst, 1885-1977
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unknown - Public Domain
Stosch, Albrecht von 1818-1896
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Ravaillac, François, 1578-1610
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Browne, Lewis, 1897-1949
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Ryland, John, 1723-1792
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Karel van Mallery - Public Domain
Barclay, William, 1546 or 1547-1608
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Edward H. Hart, Detroit Publishing Company - Public Domain
Chadwick, French Ensor, 1844-1919
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Philkon - Public Domain
Smith, Gary, 1950-
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Roscoe, William, 1753-1831
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Taylor, Lawrence, 1959-
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Cuoco, Francisco, 1933-
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Alliefendrick - CC BY-SA 3.0
Cohen, Dan, 1936-
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Cover credit: O. J. Jordan - Public Domain
Johnson, Hugh S. (Hugh Samuel), 1882-1942
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Mathew Brady - Public Domain
Warner, Levi, 1831-1911
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Robertson, Horace Clement Hugh, Sir, 1894-1960
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Rockefeller, John D., IV (John Davison), 1937-
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Pacchierotti, Gasparo, 1740-1821
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Dan V. Smith - Public Domain
United States. Army. Women's Army Corps
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Stephen Pearce - Public Domain
Penny, William, 1809-1892
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unknown - Public Domain
Gibbs, M. W.
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Gage Skidmore - CC BY-SA 3.0
West, Adam, 1928-
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Palmer, A. Mitchell (Alexander Mitchell), 1872-1936
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Inocybe - CC BY-SA 3.0
Boule, Marcellin, 1861-1942
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Flaxman, John, 1755-1826
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Public Domain
Livingston, William, 1723-1790