Image from Wikimedia Commons
Ellenleslie -
U.S. Government Printing Office - Public Domain
John Manley (Little Valley, NY), compiler and editor. Hosford & Co. (New York, NY), printer. - Public Domain
unknown - Public Domain
Mathew Brady Levin Corot Handy - Public Domain
unknown photographer (passport photographs) - Public Domain
Frantogian - CC BY-SA 3.0
Martín Tovar y Tovar - Public Domain
James E. Purdy - Public Domain
Sasha Kopf - CC BY-SA 4.0
Louis Pescevic - CC BY-SA 4.0
Radcliffe Kelso - CC BY 4.0
Σ, retouched by Wugapodes - CC BY-SA 4.0
Image from Wikimedia Commons
David-Néel, Alexandra, 1868-1969
Image from Wikimedia Commons
Ellenleslie -
Wheeler, Shannon
Image from Wikimedia Commons
Blomfield, Arthur W. 1829-1899
Image from Wikimedia Commons
U.S. Government Printing Office - Public Domain
Tupper, Stanley Roger
Image from Wikimedia Commons
Gandon, James, 1742-1823
Image from Wikimedia Commons
Grin, A. (Aleksandr), 1880-1932
Image from Wikimedia Commons
Murphy, Evelyn F.
Image from Wikimedia Commons
John Manley (Little Valley, NY), compiler and editor. Hosford & Co. (New York, NY), printer. - Public Domain
Martin, Frederick Stanley, 1794-1865
Image from Wikimedia Commons
Bauer, Marius, 1867-1932
Image from Wikimedia Commons
unknown - Public Domain
Faccio, Franco, 1840-1891
Image from Wikimedia Commons
Werrenrath, Reinald, 1883-1953
Image from Wikimedia Commons
unknown - Public Domain
Ramsay, Chevalier (Andrew Michael), 1686-1743
Image from Wikimedia Commons
Mathew Brady Levin Corot Handy - Public Domain
Blount, James Henderson, 1837-1903
Image from Wikimedia Commons
unknown photographer (passport photographs) - Public Domain
Goris, Jan Albert, 1899-1984
Image from Wikimedia Commons
Sitting Bull, 1831-1890
Image from Wikimedia Commons
Frantogian - CC BY-SA 3.0
Tylo, Hunter
Image from Wikimedia Commons
Clemens, Jeremiah, 1814-1865
Image from Wikimedia Commons
Martín Tovar y Tovar - Public Domain
Soublette, Carlos, 1789-1870
Image from Wikimedia Commons
Rabe, John, 1882-1950
Image from Wikimedia Commons
James E. Purdy - Public Domain
Abbott, Lyman, 1835-1922
Image from Wikimedia Commons
Sasha Kopf - CC BY-SA 4.0
Kopf, Silas, 1949-...
Image from Wikimedia Commons
Petrov, Racho Stoi︠a︡nov, 1861-1942
Image from Wikimedia Commons
Louis Pescevic - CC BY-SA 4.0
Miles, Jack, 1942-....
Image from Wikimedia Commons
Gemini 10 (Spacecraft)
Image from Wikimedia Commons
Collins, Richard Henn, 1842-1911
Image from Wikimedia Commons
Cebotari, Maria
Image from Wikimedia Commons
Richards, Paul, 1908-1986
Image from Wikimedia Commons
Radcliffe Kelso - CC BY 4.0
Olsen, Kristina, 1957-
Image from Wikimedia Commons
Σ, retouched by Wugapodes - CC BY-SA 4.0
Chomsky, Noam, 1928-
Image from Wikimedia Commons
Fairchild, Herman L. (Herman Le Roy), 1850-1943