John Chaloner Smith, British mezzotinto portraits, part I, London 1878, p. 134, Thomas Burke no 4 ("4. John Henry Hampe. Kauffman. H. L., in oval frame, directed and facing towards right, wig, at bottom serpent and rod, and branch, on scroll, Γαστρος κρατερ [sic], scratched, Angelica Kaufman pinx T Burke fecit. H. 4⅜ ; W. 5⅛ ; O. D. H. 4 ; W. 3⅜. Bromley, page 387, mentions that there is a long inscription, but this must be printed separately from the plate ; it is not attached to the impression in Brit. Mus. Metallurgist, &c. Died 1777.")
R. Burgess, Portraits of doctors & scientists in the Wellcome Institute, London 1973, no. 1292.1