The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new edition
The cited information was published by Alan Sutton Publishing in
Gloucester, U.K. in 2000 (Ref: volume X, page 123.) The author/originator was G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors.