Catalogue of engraved British portraits preserved in the Department of Prints and Drawings in the British Museum, v. 1, page 72
Hamilton, E. Catalogue raisonné of the engraved works of Sir Joshua Reynolds, page 2
Smith, J.C. British mezzotinto portraits, v. 2, no. 3, page 486
Russell, C.E. English mezzotint portraits and their states, v. 2, page 106