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Chad Laytham - CC BY 3.0
NASA - Public Domain
Nv8200p - CC BY-SA 4.0
Padraigogarriggruig - CC BY-SA 3.0
unknown - Public Domain
Brianweissfan - CC BY-SA 3.0
Isaac Wane Slater (engraver; 1784–1846) from a sketch by Joseph Slater - Public Domain
Ambroise Tardieu - Public Domain
Derooplamon - CC BY-SA 3.0
Alberto Cabello Mayero - CC BY 2.0
General Electric - Public Domain
Jared and Corin - CC BY-SA 2.0
Georges Biard - CC BY-SA 3.0
Arz - Public Domain
Henry Hering (1814-1893) - Public Domain
Photographer; Alexander A. Inglis / from 2nd ed. of "The Trial of Oscar Slater" by William Roughead published 1915 in Edinburgh - Public Domain
MLeinert - CC BY-SA 4.0
George Charles Beresford - Public Domain
Bain - Public Domain
Keene studio - Public Domain
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Chad Laytham - CC BY 3.0
Smith, Willie, 1936-2011
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NASA - Public Domain
Hauck, Frederick H., 1941-
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Wotton, Edward Wotton, Baron, 1548-1628
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Liggett, Walter W. (Walter William), 1886-1935
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Gregory, Duncan Farquharson, 1813-1844
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Nv8200p - CC BY-SA 4.0
Hutton, Paul Andrew, 1949-
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Padraigogarriggruig - CC BY-SA 3.0
Le Roux, Maurice
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unknown - Public Domain
Fetzer, Robert A. (Robert Allison), 1887-1968
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Brianweissfan - CC BY-SA 3.0
Weiss, Brian L. (Brian Leslie), 1944-
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unknown - Public Domain
Allen, Henry Watkins, 1820-1866
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Milliken, Charles William, 1827-1915
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Parker, Richard Wayne, 1848-1923
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Larkin, Ben C., 1873-1949
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Isaac Wane Slater (engraver; 1784–1846) from a sketch by Joseph Slater - Public Domain
Mounsey, Ann S. (Ann Sheppard), 1811-1891
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Ambroise Tardieu - Public Domain
Saussure, Horace-Bénédict de 1740-1799
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Derooplamon - CC BY-SA 3.0
Braeckman, Dirk
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Alberto Cabello Mayero - CC BY 2.0
Roberts, Marcus (Pianist)
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General Electric - Public Domain
Hingle, Pat
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Jared and Corin - CC BY-SA 2.0
Curtis, Catie
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unknown - Public Domain
Purman, William James, 1840-1928
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unknown - Public Domain
Eckhel, Joseph Hilarius von, 1737-1798
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Lesinski, John, 1885-1950
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Georges Biard - CC BY-SA 3.0
Grinberg, Anouk
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Arz - Public Domain
Venclova, Antanas, 1906-1971
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Henry Hering (1814-1893) - Public Domain
Clifford, William Hugh Joseph (bishop)
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Photographer; Alexander A. Inglis / from 2nd ed. of "The Trial of Oscar Slater" by William Roughead published 1915 in Edinburgh - Public Domain
Guthrie, Charles John Guthrie, Lord, 1849-1920
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MLeinert - CC BY-SA 4.0
Leinert, Michael, 1942-....
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George Charles Beresford - Public Domain
Yeats, W. B. (William Butler), 1865-1939
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Bain - Public Domain
Gall, Yvonne
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Keene studio - Public Domain
Turner, George (artist)