Beeke, Clive (2006年). “Abbots of Ramsey”. Ramsey Abbey website. Clive Beeke. 2007年1月23日閲覧。 “Edward [the Confessor] also became a party to an agreement between the Abbot of Ramsey and Abbot of Burgh (Peterborough) in regard to the exchange of lands; to bounds and limits of King's-delf; also the right to Ramsey Abbey to dig stone both 'squared and broken' at the quarries of Barnack. For this privilege the Abbey had to give the Monks of Peterborough 'four thousand eels yearly in Lent'”
Brooke, Rosalind; Brooke, Christopher. “Chapter 2”. Popular Religion in the Middle Ages; Western Europe 1000-1300. Thames and Hudson. pp. pp19-21. ISBN0500250871