^ abFryde, et al. Handbook of British Chronology p. 258
References
Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I. (1996). Handbook of British Chronology (Third revised ed.). Cambridge: Cambridge University Press. ISBN0-521-56350-X.
Greenway, Diana E. (1968). "Archdeacons: Essex". Fasti Ecclesiae Anglicanae 1066-1300. Vol. 1, St. Paul's, London. Institute of Historical Research. Retrieved 29 October 2007.
Greenway, Diana E. (1968). "Bishops". Fasti Ecclesiae Anglicanae 1066-1300. Vol. 1, St. Paul's, London. Institute of Historical Research. Retrieved 29 October 2007.
External links
Hutchinson, John (1892). "Richard of Gravesend" . Men of Kent and Kentishmen (Subscription ed.). Canterbury: Cross & Jackman. p. 116.