Farington Diary, vol. 7, p. 2775 (1 June 1806); Farington Biographical Note p. 12; Ford 1948, p. 345, no. 8; Ford 1951, pp. 23, 59, no. 54; WGC, pp. 33, 108; Burlington Magazine, December 1973; Solkin 1982, pp. 168-169; Clark & Bowron 1985, p. 267 under cat. 195; E.P Bowron & J.J. Rishel eds., Art in Rome in the Eighteenth Century, 2000, pp. 557-58 (entry by A. Percy).