(en) Debrett's Illustrated Peerage, of the United Kingdom of Great Britain and Ireland. Under the Immediate Revision and Correction of the Peers, Bosworth, (lire en ligne), p. 408
The British Imperial Calendar, Winchester and Varnham, (lire en ligne), p. 54
John Britton, James Norris Brewer, Edward Wedlake Brayley, Joseph Nightingale, Frederic Shoberl, John Hodgson, Francis Charles Laird, John Bigland, John Evans et Thomas Rees, The beauties of England and Wales : or, Delineations, topographical, historical, and descriptive, of each county, Verner & Hood, (lire en ligne), p. 557 note