Foster, Joseph, ed. Pedigrees Recorded at the Heralds' Visitations of the Counties of Cumberland and Westmorland, made by Richard St George, Norroy King of Arms in 1615, and by William Dugdale, Norroy King of Arms in 1666. Carlisle: C. Thurnam & Sons, [1891?].
Hasler, P.W. The History of Parliament: The House of Commons, 1558–1603. 3 vols. London: HMSO, 1981.
Oxford Dictionary of National Biography. 01/05/2005 (http://www.oxforddnb.com)