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anonymous - Public Domain
Whie and Hallen Studios, New York - Public Domain
Hortense.throgmorton - Public Domain
Barklestork - CC BY-SA 3.0
unknown - Public Domain
Contemporary portrait - Public Domain
Huster - Public Domain
MichaelNetzer - CC BY-SA 3.0
"The Post Register" (Idaho Falls, ID). - Public Domain
Martina Judt -
Koeniglicher Hoffotograf - Public Domain
National Photo Company - Public Domain
Magazelka - CC BY-SA 3.0
Joseph Kriehuber Foto: :de:Peter Geymayer - Public Domain
South Dakota State Historical Society - Public Domain
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anonymous - Public Domain
Doubleday, Thomas, 1790-1870
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Whie and Hallen Studios, New York - Public Domain
Stahl, Rose, -1955
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Hortense.throgmorton - Public Domain
Tranter, John E.
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Frenssen, Gustav, 1863-1945
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Escalante, Jaime
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Barklestork - CC BY-SA 3.0
Packard, William.
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unknown - Public Domain
Sharpe, Edmund, 1809-1877
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Contemporary portrait - Public Domain
Birley, Hugh Hornby, -1845
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Huster - Public Domain
Cerrito, Fanny
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MichaelNetzer - CC BY-SA 3.0
Blair, Mary, 1911-1978
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"The Post Register" (Idaho Falls, ID). - Public Domain
Ross, Charles Benjamin, 1876-1946
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Mackonochie, A. H. (Alexander Heriot), 1825-1887
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Martina Judt -
Hrdlicka, Alfred, 1928-2009
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unknown - Public Domain
Thacher, Thomas Anthony, 1815-1886
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Koeniglicher Hoffotograf - Public Domain
Mohl, Ottmar von.
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National Photo Company - Public Domain
Gerry, Peter Goelet, 1879-1957
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Tryon, Dwight William, 1849-1925
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Magazelka - CC BY-SA 3.0
Gelman, Juan, 1930-2014
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unknown - Public Domain
Smith, Lyman Cornelius, 1850-1910
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Kelly, Dorothy, 1894-1966
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unknown - Public Domain
T︠S︡iolkovskiĭ, K. (Konstantin), 1857-1935
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Brown, William G. (William Gay), 1800-1884
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unknown - Public Domain
Enukidze, A., 1877-1937
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unknown - Public Domain
Sleigh, Bernard, 1872-
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Joseph Kriehuber Foto: :de:Peter Geymayer - Public Domain
Prokesch von Osten, Anton, Graf, 1795-1876
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South Dakota State Historical Society - Public Domain
Pennington, John L., 1821-1900
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Singmaster, David
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Fuller, Arthur B. (Arthur Buckminster), 1822-1862
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Diesel, Rudolf, 1858-1913
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unknown - Public Domain
Burlingame, Anson, 1820-1870