C J Spencer and S W Jolly, 'Bowland: the rise and decline, abandonment and revival of a medieval lordship' The Escutcheon: Journal of the Cambridge University Heraldic & Genealogical Society 15, 2010 DownloadArchived 11 July 2011 at the Wayback Machine
C J Spencer and S W Jolly, 'Bowland: the rise and decline, abandonment and revival of a medieval lordship' The Escutcheon: Journal of the Cambridge University Heraldic & Genealogical Society 15, 2010 DownloadArchived 11 July 2011 at the Wayback Machine