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Robert Wright - CC BY 4.0
Dorothy A. Walker - Public Domain
Polygoon Hollands Nieuws - CC BY-SA 3.0
Charles-Lucien-Louis Muller - Public Domain
Apogeeweb - CC BY-SA 3.0
unknown - Public Domain
Henry W. and Albert A. Berg Collection of English and American Literature - Public Domain
Dd-b - CC BY-SA 3.0
Repdan - CC BY-SA 3.0
Who-When-What Company - Public Domain
Feihua -
Benque & Kindermann, Hamburg - Public Domain
Contemporary Greek Art Institute - CC BY-SA 4.0
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Robert Wright - CC BY 4.0
Salle, David, 1952-....
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Barr, Robert, 1850-1912
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Dorothy A. Walker - Public Domain
Walker, Joseph A., 1935-
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Polygoon Hollands Nieuws - CC BY-SA 3.0
Haley, William 1901-1987
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Charles-Lucien-Louis Muller - Public Domain
Abercorn, James Hamilton, Duke of, 1811-1885
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Escher von der Linth, Hans Konrad, 1767-1823
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Apogeeweb - CC BY-SA 3.0
Tiel, Vicky
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Lothian, Schomberg Henry Kerr, Marquess of, 1833-1900
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unknown - Public Domain
Portugal, Juan Cayetano, 1783-1850
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Henry W. and Albert A. Berg Collection of English and American Literature - Public Domain
O'Flaherty, Liam, 1896-1984
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Schott, Arthur, 1814-1875
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Dd-b - CC BY-SA 3.0
Dyer-Bennet, Richard
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Mendenhall, Walter C. (Walter Curran), 1871-1957
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Reich, Robert B.
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Burtness, Olger B. (Olger Burton), 1884-1960
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Repdan - CC BY-SA 3.0
Gelernter, David Hillel.
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Who-When-What Company - Public Domain
Smith, Oliver H. (Oliver Hampton), 1794-1859
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Zelada, Cardinal de (Francesco Saverio), approximately 1717-1801
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Bixio, Nino, 1821-1873
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Feihua -
Soloff, Lew
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unknown - Public Domain
Alexander, W. D. (William De Witt), 1833-1913
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unknown - Public Domain
Gordon, John Brown, 1832-1904
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Gardner, Isabella Stewart, 1840-1924
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Borja y Aragón, Francisco de, príncipe de Esquilache, 1582-1658
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Corrigan, Michael Augustine, 1839-1902
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Benque & Kindermann, Hamburg - Public Domain
Riemann, Hugo, 1849-1919
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Piccoli, Michel, 1925-....
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unknown - Public Domain
Mastrocinque, Camillo, 1901-1969
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Contemporary Greek Art Institute - CC BY-SA 4.0
Chryssa, 1933-2013
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Maskelyne, Nevil, 1732-1811