Image from Wikimedia Commons
unknown photographer - Public Domain
City of Chicago - Public Domain
Franck (1816–1906), photographer; unknown engraver - Public Domain
Elliott & Fry - Public Domain
Public Domain
user at project - Public Domain
Walter Stoneman - Public Domain
Moornebel - CC BY-SA 4.0
:de:Walter Bondy - Public Domain
unknown - Public Domain
Bill Doll and Company, New York-publicity agency - Public Domain
Rudolf Krziwanek - Public Domain
Frim99954p - CC BY-SA 3.0
Image from Wikimedia Commons
Elon, Mordekhai
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unknown photographer - Public Domain
Fisk, James, Jr., 1835-1872
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City of Chicago - Public Domain
Ogden, William B. (William Butler), 1805-1877
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Clark, Alfred Corning, 1844-1896
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Guadet, Marguerite-Élie, 1758-1794
Image from Wikimedia Commons
Franck (1816–1906), photographer; unknown engraver - Public Domain
Dietsch, Louis, 1808-1865
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Elliott & Fry - Public Domain
Robertson, W. R. (William Robert), 1860-1933
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Public Domain
Grayson, William, 1736-1790
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user at project - Public Domain
Steinman, D. B. (David Barnard), 1886-1960
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Walter Stoneman - Public Domain
Barbour, David M. (David Miller), Sir, 1841-
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Westlake, John, 1828-1913
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Williams, Harry, 1879-1922
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Moornebel - CC BY-SA 4.0
Saygun, Ahmed Adnan
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Sagredo, Nicolo
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:de:Walter Bondy - Public Domain
Frank, Bruno, 1887-1945
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Public Domain
López Rayón, Ignacio, 1773-1832
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Fox, Jay, 1870-1961
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unknown - Public Domain
Encke, Johann Franz, 1791-1865
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Kubelík, Jan
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Bill Doll and Company, New York-publicity agency - Public Domain
Swann, Donald, 1923-1994
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Glendenin, Lawrence E. (Lawrence Elgin), 1918-2008
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Rudolf Krziwanek - Public Domain
Smareglia, António, 1854-1929
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unknown - Public Domain
Campbell, John, 1766-1840
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Pollarolo, Carlo Francesco, approximately 1653-1723
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Greene, William Batchelder, 1819-1878
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Swedenborg, Emanuel, 1688-1772
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Hillegas, Michael, 1729-1804
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unknown - Public Domain
Kempe, A. B. (Alfred Bray), 1849-1922
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Frim99954p - CC BY-SA 3.0
Botstein, Leon
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Salgari, Emílio, 1862-1911