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Benjamin Disraeli, from Utopia Portrait Gallery [1]archive copy at the Wayback Machine, "A selection of portraits of historical figures from the University of Texas Libraries. The images in this collection are in the public domain. You do not need to ask for permission to use these images."
Original source: Duyckinick, Evert A. Portrait Gallery of Eminent Men and Women in Europe and America. New York: Johnson, Wilson & Company, 1873.
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.