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United States Navy - Public Domain
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John B. Horner - Public Domain
Public Domain
Francisco Villamena ((Engraver:Jean Leclerc (1585-1633))) - Public Domain
Herbert Lambert (1881-1936) - Public Domain
Jac. de Nijs / Anefo -
unknown - CC BY 3.0
Lorie Shaull - CC BY-SA 2.0
Eva Rinaldi - CC BY-SA 2.0
Dan Harasymchuk - CC BY-SA 4.0
Atelier Rude - CC BY-SA 3.0
en - Public Domain
Bain News Service photo (John Garo) - Public Domain
JQRalph - CC BY 3.0
Gage Skidmore - CC BY-SA 3.0
Etienne Jules Marey - CC0 1.0
Fides11 - CC0 1.0
MaxPride - CC BY-SA 3.0
Helene C. Stikkel - Public Domain
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United States Navy - Public Domain
Crose, W. M. (William Michael), 1867-1929
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Campbell, John A. (John Allen), 1835-1880
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John B. Horner - Public Domain
Blanchet, Francis Norbert, 1795-1883
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Townshend, Horatio Townshend, Viscount, 1630-1687
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Buckle, Henry Thomas, 1821-1862
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Brookes, Mabel Balcombe, 1890-1975
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Public Domain
Ward, Henry A. (Henry Augustus), 1834-1906
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Public Domain
Shoup, George L. (George Laird), 1836-1904
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Francisco Villamena ((Engraver:Jean Leclerc (1585-1633))) - Public Domain
Clavius, Christoph, 1538-1612
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Herbert Lambert (1881-1936) - Public Domain
Bax, Arnold
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Frauenfeld, Georg, Ritter von, 1807-1873
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Jac. de Nijs / Anefo -
Fiedler, Leslie A.
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unknown - CC BY 3.0
Dickens, Frederick William, 1820-1868
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Lorie Shaull - CC BY-SA 2.0
McCorvey, Norma, 1947-....
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Eva Rinaldi - CC BY-SA 2.0
Chambers, Kasey
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Dan Harasymchuk - CC BY-SA 4.0
Galloway, Steven, 1975-
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Atelier Rude - CC BY-SA 3.0
Løvberg, Aase Nordmo, 1923-
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en - Public Domain
Roberts, Joseph J. (Joseph Jenkins), 1809-1876
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Bain News Service photo (John Garo) - Public Domain
Koussevitzky, Serge, 1874-1951
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Pratt, Bela Lyon, 1867-1917
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JQRalph - CC BY 3.0
Peplowski, Ken
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Gage Skidmore - CC BY-SA 3.0
Fancher, Hampton
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Brett, John, 1831-1902
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Etienne Jules Marey - CC0 1.0
Marey, Étienne-Jules 1830-1904
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Fides11 - CC0 1.0
Patrizi, Constantino, 1798-1876
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Farnum, William, 1876-1953
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Oldenburg, Henry, approximately 1615-1677
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Ferguson, James, 1797-1867
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MaxPride - CC BY-SA 3.0
Coughlan, Mary
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Helene C. Stikkel - Public Domain
Robertson of Port Ellen, George, Lord, 1946-