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John Horace Round, MA, ed., "Ancient Charters Royal and Private Prior to AD 1200...
Full citation
John Horace Round, MA, ed., "Ancient Charters Royal and Private Prior to AD 1200 Part I", The Publications of the Pipe Roll Society, X, (London: Wyman and Sons, 1888), accessed 15 September 2014, https://archive.org/stream/ancientchartersr10grea#page/8/mode/2up pp.8-10.