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Benjamin Robert Haydon - Public Domain
Seedsman - CC BY-SA 3.0
O. F. Knutsen - Public Domain
Unidentified photographer - Public Domain
Sphilbrick - CC BY-SA 4.0
Peter Campbell - CC BY-SA 4.0
Elisa Cabot - CC BY-SA 2.0
unknown - Public Domain
Smithsonian Institution -
Georges Biard - CC BY-SA 3.0
Not stated - Public Domain
original uploader -
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Benjamin Robert Haydon - Public Domain
Greville, Robert Kaye, 1794-1866
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Seedsman - CC BY-SA 3.0
Olds, Sharon
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O. F. Knutsen - Public Domain
Wergeland, Henrik Arnold, 1808-1845
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Unidentified photographer - Public Domain
Birch, Reginald B., 1856-1943
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Sphilbrick - CC BY-SA 4.0
Lieberman, Nancy, 1958-
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Anstey, Christopher, 1724-1805
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Rumford, Sarah Thompson, Countess, 1774-1852
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Thorndike, Russell, 1885-1972
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Peter Campbell - CC BY-SA 4.0
Milne, Christine, 1953-
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Scliar, Moacyr
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Paz Soldán, Mariano Felipe, 1821-1886
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Elisa Cabot - CC BY-SA 2.0
Gil de Biedma, Jaime, 1929-1990
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Claudet, A. (Antoine), 1797-1867
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Nelson, Donald Marr, 1888-1959
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Brauer, Richard, 1901-
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Cheadle, Walter B. (Walter Butler), 1835-1910
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Maimonides, Moses, 1135-1204
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Sharp, Samuel, 1700?-1778
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Odell, N. E. (Noel Ewart), 1890-1987
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unknown - Public Domain
Arrowsmith, Aaron, 1750-1823
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Blane, Gilbert, Sir, 1749-1834
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Chen, Jiongming, 1878-1933
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Engel, Jules, 1909-2003
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Smithsonian Institution -
Trotter, Mildred, 1899-1991
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Sibley, Henry Hastings, 1811-1891
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Georges Biard - CC BY-SA 3.0
Sanderson, Richard, 1953-....
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Not stated - Public Domain
Mahony, Francis, 1804-1866
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Caldwell, Millard Fillmore, 1897-1984
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original uploader -
Kivelson, M. G. (Margaret Galland), 1928-
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Du Deffand, Marie de Vichy Chamrond, marquise, 1697-1780