Image from Wikimedia Commons
unknown -
AmChestertonSoc - CC BY-SA 3.0
Moffet Studio - Public Domain
unknown - Public Domain
Michiel Hendryckx - CC BY-SA 4.0
Jim Heaphy (cropping and editing) -
Meet the media Guru - CC BY-SA 2.0
Vogler - CC BY-SA 3.0
Public Domain
Unknown; scanned by 天竺鼠 - Public Domain
Frederick Converse Beach, editor - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
Marcel Antonisse / Anefo - CC BY-SA 3.0
Talmidavi - CC BY-SA 4.0
John Bock - CC BY-SA 3.0
anonymous - Public Domain
Image from Wikimedia Commons
unknown -
Launis, Armas, 1884-1959
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Bigelow, Henry Jacob, 1818-1890
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AmChestertonSoc - CC BY-SA 3.0
Ahlquist, Dale.
Image from Wikimedia Commons
Moffet Studio - Public Domain
Calhoun, William J. (William James), 1848-1916
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unknown - Public Domain
Spare, Austin Osman, 1886-1956
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Michiel Hendryckx - CC BY-SA 4.0
Zorio, Gilberto Gilberto, 1944-
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Rich, Penelope, Lady, 1562?-1607
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Bouquet, Henry, 1719-1765
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Barlow, Joel, 1754-1812
Image from Wikimedia Commons
Jim Heaphy (cropping and editing) -
Clyde, Norman, 1885-1972
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unknown - Public Domain
Leahy, Frank, 1908-1973
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Meet the media Guru - CC BY-SA 2.0
Horner, John R.
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Bush, S. P. (Samuel Prescott), 1863-1948
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Vogler - CC BY-SA 3.0
Heeger, Alan J., 1936-
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Volstead, Andrew J. (Andrew John), 1860-1947
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Losey, Joseph
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Lee, Mary Greenhow, 1819-?
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Seidl, Ulrich, 1952-...
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Public Domain
Abarca, Joachim 1778-1844
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Hamilton, Linda, 1956-
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Unknown; scanned by 天竺鼠 - Public Domain
Cheng, Tianfang, 1899-1967
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Birch, Thora
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Frederick Converse Beach, editor - Public Domain
Du Pont, Henry, 1812-1889
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Cattell, Alexander G. (Alexander Gilmore), 1816-1894
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Marcel Antonisse / Anefo - CC BY-SA 3.0
Monge, Luis Alberto
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Leroy d'Étiolles, Jean-Jacques-Joseph (1798-1860).
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Talmidavi - CC BY-SA 4.0
Ziegler, Ignaz, 1861-1948
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John Bock - CC BY-SA 3.0
Bock, John, 1965-....
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anonymous - Public Domain
Morris, Gouverneur, 1876-1953
Image from Wikimedia Commons
unknown - Public Domain
Reynolds, Daniel Harris, 1832-1902