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Benjamin - Public Domain
Public Domain
Samuel Cousins George Frederic Watts - Public Domain
Sharon Styer -
Flickr user klg19 - CC BY-SA 2.0
IslandsEnd - CC BY 3.0
Bain - Public Domain
David Dobkin [http://www.cs.princeton.edu/~dpd] - CC BY-SA 3.0
Samuel Laurence - Public Domain
The Nobel Foundation - Public Domain
Perry, WIlliam Stevens - Public Domain
unknown photographer - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Gustave Staal - Public Domain
unknown - Public Domain
unknown -
B. G. Co.=Bowman Gum Company - Public Domain
Photographer not credited - Public Domain
Minya Diez-Duhrkoop - CC BY-SA 4.0
William Paul Dillingham (1843-1923) in 1904.tif - Public Domain
website - CC BY-SA 3.0
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Benjamin - Public Domain
Granier de Cassagnac, A. (Adolphe), 1806-1880
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Kuniyoshi, Yasuo, 1893-1953
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Public Domain
Stephens, John L., 1805-1852
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Luskačová, Markéta, 1944-
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Samuel Cousins George Frederic Watts - Public Domain
Griffiths, John, 1806-1885
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Sharon Styer -
Lin, Maya Ying
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Flickr user klg19 - CC BY-SA 2.0
Koren, Edward.
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IslandsEnd - CC BY 3.0
Criswell, W. A. (Wallie A.), 1909-2002
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Bain - Public Domain
Gleaves, Albert, 1858-1937
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Cook, George S. (George Smith), 1819-1902
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David Dobkin [http://www.cs.princeton.edu/~dpd] - CC BY-SA 3.0
Kao, Charles K., 1933-
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Samuel Laurence - Public Domain
Kenney, James, 1780-1849
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The Nobel Foundation - Public Domain
Haber, Fritz, 1868-1934
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Perry, WIlliam Stevens - Public Domain
Clarkson, Robert H. (Robert Harper), 1826-1884
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unknown photographer - Public Domain
Levy, Samuel, 1876-1953
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Mathew Brady Levin Corot Handy - Public Domain
Anderson, John Alexander, 1834-1892
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Gustave Staal - Public Domain
Quérard, Joseph-Marie, 1797-1865
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Cobbold, T. Spencer (Thomas Spencer), 1828-1886
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Takasaki, Tatsunosuke, 1885-1964
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Public Domain
Trenchard, Hugh Montague, 1873-1956
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unknown - Public Domain
Maclagan, William Dalrymple, 1826-1910
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Colborne, John, Sir, 1778-1863
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Ouspenskaya, Maria, 1876-1949
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unknown -
Strzygowski, Josef, 1862-1941
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B. G. Co.=Bowman Gum Company - Public Domain
Mintz, Eli, 1904-1988
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Photographer not credited - Public Domain
Towne, Charles A. (Charles Arnette), 1858-1928
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Minya Diez-Duhrkoop - CC BY-SA 4.0
Valencia, Tórtola, 1882-1955
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unknown - Public Domain
Miller, Alice Duer, 1874-1942
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William Paul Dillingham (1843-1923) in 1904.tif - Public Domain
Dillingham, William P. (William Paul), 1843-1923
Image from Wikimedia Commons
website - CC BY-SA 3.0
Nussbaum, Martha Craven, 1947-....