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2. ———. Illustrious Friends: The Story of Joseph Severn and his Son Arthur. New York: Reynal, 1965.
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4. Burke’s Peerage & Baronetage. Ed. Charles Mosley. 2 vols. London: Fitzroy Dearborn, 1999.
5. Dictionary of Art. Ed. Jane Turner. 34 vols. New York: Grove, 1996.