Prince F. Duleep Singh, Portraits in Norfolk Houses, Norwich, I, 1928, p. 177, no. 22, as 'Thomas Kerrich of Geldeston, circa 1780'.
E. Emmerling, Pompeo Batoni, sein Leben und Werk, Darmstadt, 1932, p. 104, no. 35, as 'circa 1780'.
J. Steegman, 'Some English Portraits by Pompeo Batoni', The Burlington Magazine, LXXXVII, March 1946, p. 63, no. 84, as 'circa 1783'.
I. Belli Barsali, in Dizionario biografico degli italiani, VII, Rome, 1965, p. 201.
E.P. Bowron and F. Russell, 'A List of Pompeo Batoni's British Sitters', Pompeo Batoni and his British Patrons, exhibition catalogue, Kenwood, 1982, p. 92, no. 99, as 'circa 1767'.
A.M. Clark, Pompeo Batoni: A Complete Catalogue of his Works with an Introductory Text, ed. E.P. Brown, Oxford, 1985, pp. 333-4, no. 379, as 'circa 1773-4'.
J. Ingamells, A Dictionary of British and Irish Travellers in Italy, 1701-1800, compiled from the Brinsley Ford Archive, New Haven and London, 1997, p. 574.
E.P.Bowron and P. Kerber, Pompeo Batoni (forthcoming).