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unknown - Public Domain
unknown (scanned and uploaded by Chriusha - Public Domain
Civil War glass negative collection, Library of Congress - Public Domain
Stephen Wolfram's PR team/Stephen Faust - CC BY-SA 3.0
Swingsong.or - CC BY-SA 4.0
Evers, Joost / Anefo -
original uploader - Public Domain
anonymous - Public Domain
Unknwon - CC0 1.0
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
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unknown - Public Domain
Jack, David Russell, -1913
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Mansart, Jules Hardouin, 1645 or 1646-1708
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Roberts, Beatrice, 1905-1970
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Wahl, William H. (William Henry), 1848-1909
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Abreu, Zéquinha de 1880-1935
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Hoar, Roger Sherman
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Ebsworth, Joseph Woodfall, 1824-1908
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Sutherland, Daniel Alexander, 1869-1955
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unknown (scanned and uploaded by Chriusha - Public Domain
Wirz, Henry, 1823?-1865
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Ilbert, Courtenay, 1841-1924
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Civil War glass negative collection, Library of Congress - Public Domain
Cullum, George Washington, 1809-1892
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Stephen Wolfram's PR team/Stephen Faust - CC BY-SA 3.0
Wolfram, Stephen
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Swingsong.or - CC BY-SA 4.0
Carone, Nicholas, 1917-2010
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Barnes, Josephine.
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Richepin, Jean, 1849-1926
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Ephraem, Syrus, Saint, 303-373
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Dannenberg, Konrad 1912-2009
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Evers, Joost / Anefo -
Jakobovits, Immanuel, Sir, 1921-
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Cowles, Edwin, 1825-1890
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original uploader - Public Domain
Runge, Carl, 1856-1927
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Cambry, Jacques, 1749-1807
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anonymous - Public Domain
Coli, François 1881-1927
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unknown - Public Domain
Boyle, Henry, Baron Carleton, -1725
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Unknwon - CC0 1.0
Morris, Lewis, 1701-1765
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Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Boyd, Belle, 1844-1900
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unknown - Public Domain
Peterson, Frederick, 1859-1938
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Pigage, Nicolas de 1723-1796
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Rhodes, Richard, 1937-....
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Rumford, Benjamin, Graf von, 1753-1814
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Volkov, A. (Aleksandr Melentʹevich)