Image from Wikimedia Commons
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Nathaniel Dance (1735–1811) - Public Domain
unknown photographer - Public Domain
Stephen Pearce - Public Domain
Not stated - Public Domain
William Cochrane (1831-1898) and John Castell Hopkins (1864-1923) - Public Domain
CBS Network - Public Domain
Photograph - Public Domain
Public Domain
unknown - Public Domain
Unknown military photographer of the Signal Corps - Public Domain
Charme Seeds - Public Domain
Anonymous - Public Domain
Rattila - CC BY-SA 3.0
Image from Wikimedia Commons
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Wright, Hendrick B. (Hendrick Bradley), 1808-1881
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Nathaniel Dance (1735–1811) - Public Domain
Reay, Martha
Image from Wikimedia Commons
Rhodes, James A. (James Allen), 1909-2001
Image from Wikimedia Commons
unknown photographer - Public Domain
Yarrell, William, 1784-1856
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Kandel, Eric Richard, 1929-
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Stephen Pearce - Public Domain
Belcher, Edward, Sir, 1799-1877
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Speyer, Leonora, 1872-1956
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Shepard, Charles Upham, 1804-1886
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Ennis, George Pearse (American painter and craftsman, 1884-1936)
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Barham, Thomas Foster, 1794-1869
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Williams, Thomas, 1737-1802
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Not stated - Public Domain
Cozzens, Frederic S. (Frederic Swartwout), 1818-1869
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Peng, Mingmin
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William Cochrane (1831-1898) and John Castell Hopkins (1864-1923) - Public Domain
Durieu, Paul, 1830-1899
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CBS Network - Public Domain
Roberts, Tanya, 1955-
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Jones, Lloyd, 1955-....
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Photograph - Public Domain
Judd, Norman B. (Norman Buel), 1815-1878
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Public Domain
Travers, P.L. (Pamela Lyndon), 1899-1996
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Gulick, John Thomas
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Lamas, Lorenzo
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Gerbert, Martin, 1720-1793
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Hill, John, 1912-2007
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unknown - Public Domain
Lincoln, Frederick Charles, 1892-
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Tone, Theobald Wolfe, 1763-1798
Image from Wikimedia Commons
Unknown military photographer of the Signal Corps - Public Domain
Ainsworth, W. L. (Walden Lee), 1886-1960
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Charme Seeds - Public Domain
Prince, Walter Franklin, 1863-1934
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unknown - Public Domain
Bülow, Karl von, 1846-1921
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Dasch, George John, 1903-1992
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Anonymous - Public Domain
Warner, Glenn S. (Glenn Scobey), 1871-1954
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Rattila - CC BY-SA 3.0
Carro, Joannes de, 1770-1857