The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom. 1887–98 (8 vols); 1910–59 (13 vols). 6 vols. Gloucester: Alan Sutton, 1982.
Doubleday, Herbert Arthur. The Victoria History of the County of Bedford. Victoria History of the Counties of England. 3. Westminster: A. Constable, 1904-1912.
Oxford Dictionary of National Biography. 01/05/2005 (http://www.oxforddnb.com)
