(en) Edmund Burke, Dodsley's Annual Register or a View of the History, Politics and Literature for the Year 1790, J. Dodsley, (lire en ligne), p. 244
(en) John Burke, A General and Heraldic Dictionary of the Peerage and Baronetage of the British Empire, H. Colburn and R. Bentley, (lire en ligne), p. 275
(en) Arthur Collins, The Peerage of England: Containing a Genealogical and Historical Account of All the Peers of that Kingdom, W. Strahan, J. F and C. Rivington, (lire en ligne), p. 266