Image from Wikimedia Commons
Gilles Larrain - CC BY-SA 3.0
unknown - Public Domain
Polygoon Hollands Nieuws - CC BY-SA 3.0
AJ -
US War Department - Public Domain
Internet Archive Book Images -
Photographer unknown. Photo from autobiography published in 1912 - Public Domain
Photographer unidentified - Public Domain
gdcgraphics -
original uploader - CC BY-SA 3.0
Conrad Martens (1801 - 21 August 1878) - Public Domain
Étienne Jeaurat and Edme Jeaurat (1688-1738) - Public Domain
Perry, William Stevens - Public Domain
Félix Nadar - Public Domain
Olivier Strecker - CC BY-SA 3.0
Image from Wikimedia Commons
Gilles Larrain - CC BY-SA 3.0
Girodias, Maurice
Image from Wikimedia Commons
unknown - Public Domain
Balfour, Andrew, Sir, 1873-1931
Image from Wikimedia Commons
Polygoon Hollands Nieuws - CC BY-SA 3.0
Landré, Guillaume
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unknown - Public Domain
Micheaux, Oscar, 1884-1951
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unknown - Public Domain
Boussingault, J. B. (Jean Baptiste), 1802-1887
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Hallam, Henry, 1777-1859
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Winchilsea, George Finch, earl of, 1752-1826
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Justice, William Wayne, 1920-2009
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AJ -
Haag, Richard
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US War Department - Public Domain
Hubbell, William Stone, 1837-1930
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Internet Archive Book Images -
Clark, Francis E. (Francis Edward), 1851-1927
Image from Wikimedia Commons
Photographer unknown. Photo from autobiography published in 1912 - Public Domain
Grenfell, Wilfred Thomason, Sir, 1865-1940
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Weiner, Leó, 1885-1960
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Barth, Carl
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Howard, James, 1821-1889
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Tardieu, Nicolas Henri, 1674-1749
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Photographer unidentified - Public Domain
Runcie, Constance Owen Faunt Le Roy, 1836-1911
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Drake, Nathan, 1766-1836
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unknown - Public Domain
Ward, Eber B., 1811-1875
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gdcgraphics -
Attenborough, Richard
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unknown - Public Domain
Bourchier, Thomas, 1404?-1486
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Verdone, Carlo, 1951-....
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original uploader - CC BY-SA 3.0
Neff, Tom, 1953-
Image from Wikimedia Commons
Conrad Martens (1801 - 21 August 1878) - Public Domain
Beagle Expedition (1831-1836)
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unknown - Public Domain
Hengstenberg, Ernst Wilhelm, 1802-1869
Image from Wikimedia Commons
Étienne Jeaurat and Edme Jeaurat (1688-1738) - Public Domain
Maillet, Benôit de, 1656-1738
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Perry, William Stevens - Public Domain
Gregg, Alexander, 1819-1893
Image from Wikimedia Commons
Félix Nadar - Public Domain
Vacquerie, Auguste, 1819-1895
Image from Wikimedia Commons
unknown - Public Domain
Stein, Edith, Saint, 1891-1942
Image from Wikimedia Commons
Olivier Strecker - CC BY-SA 3.0
D'Amato, Joe, 1936-1999