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A.M. Clarke, Pompeo Batoni, A Complete Catalogue of his Works with an Introductory Text, edited and prepared for publication by E.P. Bowron, Oxford, 1985, pp. 321-2, no. 344A, pl. 313.
F. Russell, 'Notes on Grand Tour Portraiture', The Burlington Magazine, 136, 1994, p. 440
J. Ingamells, A Dictionary of British and Irish Travellers in Italy, 1701-1800, New Haven and London, 1997, p. 272.