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Sarah Stierch - CC BY 2.0
unknown - Public Domain
Tobias Stimmler - Public Domain
Norman Nithman - CC BY 2.0
Edward Wilton Carpenter, Charles Frederick Morehouse - Public Domain
Edgy01 - CC BY-SA 3.0
Sir Charles William Ross - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Public Domain
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Worsley, Richard, Sir, 1751-1805
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Sarah Stierch - CC BY 2.0
Bailey, Herman Kofi, Jr., 1931-1981
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Carus, Julius Victor, 1823-1903
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Haar, Alfréd, 1885-1933
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unknown - Public Domain
Backer-Grøndahl, Agathe
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Tobias Stimmler - Public Domain
Frisius, Johannes, 1505-1565
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Norman Nithman - CC BY 2.0
Sawyer, Eugene, 1934-2008
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Edward Wilton Carpenter, Charles Frederick Morehouse - Public Domain
Dickinson, Edward, 1803-1874
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Edgy01 - CC BY-SA 3.0
Sanders, Harland, 1890-1980
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Bates, Joseph, 1792-1872
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Brassin, Louis, 1840-1884
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Beckman, Arnold O.
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unknown - Public Domain
Bogdanov, A. (Aleksandr), 1873-1928
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Sir Charles William Ross - Public Domain
Ellice, Edward, 1781-1863
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Schmidt, J. F. Julius (Johann Friedrich Julius), 1825-1884
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Benedict XVI, Pope, 1927-
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Barnett, Jackson, 1856-1934
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Croone, William, 1633-1684
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Carmody, Don.
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Attwood, Thomas, 1783-1856
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unknown - Public Domain
Gregory, Charles Hutton, 1817-1898
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Paganini, Nicoló, 1782-1840
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unknown - Public Domain
Gorostiza, Carlos
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Brundage, Frances, 1854-1937
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Long, Crawford Williamson, 1815-1878
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unknown - Public Domain
Zeid, Fahrelnissa, 1901-1991
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Mathew Brady Levin Corot Handy - Public Domain
Williams, James, 1825-1899
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Public Domain
Ruger, Thomas Howard, 1833-1907
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Liédet, Loyset
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Mathew Brady Levin Corot Handy - Public Domain
Kellogg, William Pitt, 1831-1918.