Image from Wikimedia Commons
Carl Mayer - Public Domain
Thomas Murray - Public Domain
Louisa Dedalus - CC BY-SA 4.0
Rob C. Croes / Anefo - CC BY-SA 3.0
unknown - Public Domain
Ian Burns - CC BY-SA 4.0
Illustrator not indicated - Public Domain
Sketch of William Henry Channing, done during his lifetime. Channing died in 1884. - Public Domain
Moshe Pridan - Public Domain
Anefo - CC0 1.0
Doane Robinson (1856-1946). - Public Domain
Anonymous - Public Domain
J. T. White Company - Public Domain
P. Birken - CC BY-SA 3.0
US govt. - Public Domain
Image from Wikimedia Commons
Carl Mayer - Public Domain
Reinick, Robert, 1805-1852
Image from Wikimedia Commons
Thomas Murray - Public Domain
Halley, Edmond, 1656-1742
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Charpak, Georges
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Louisa Dedalus - CC BY-SA 4.0
Adams, John Luther, 1953-
Image from Wikimedia Commons
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716
Image from Wikimedia Commons
Rob C. Croes / Anefo - CC BY-SA 3.0
Topol, 1935-
Image from Wikimedia Commons
unknown - Public Domain
Williams, John, 1752-1806
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Beilstein, Friedrich Konrad, 1838-1906
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Ian Burns - CC BY-SA 4.0
Capes, Bernard Edward Joseph, -1918
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Delane, John Thaddeus, 1817-1879
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Illustrator not indicated - Public Domain
Drew, Daniel, 1797-1879
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unknown - Public Domain
Drake, Edwin Laurentine, 1819-1880
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Paganini, Nicoló, 1782-1840
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Sketch of William Henry Channing, done during his lifetime. Channing died in 1884. - Public Domain
Channing, W. H. (William Henry), 1810-1884
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Taylor, Henry, Sir, 1800-1886
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Cuming, Thomas B. (Thomas Barney), 1828-1858
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Moshe Pridan - Public Domain
Levitt, Arthur, 1900-1980
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unknown - Public Domain
Dasburg, Andrew, 1887-1979
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Anefo - CC0 1.0
Orbison, Roy, 1936-1988
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Doane Robinson (1856-1946). - Public Domain
Sheldon, Charles H. (Charles Henry), 1840-1898
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Bigelow, Kathryn
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Leichhardt, Ludwig, 1813-1848
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Laurens, John, 1754-1782
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Anonymous - Public Domain
Spotted Elk, Molly, 1903-1977
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J. T. White Company - Public Domain
Kalbfleisch, Martin, 1804-1873
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Danti, Ignazio, 1536-1586
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Steiger, William A., 1938-1978
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Amis, Martin
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P. Birken - CC BY-SA 3.0
Jameson, Antony, 1934-
Image from Wikimedia Commons
US govt. - Public Domain
Young, Johnny, 1940-