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nationalarchives.gov.uk
discovery.nationalarchives.gov.uk
"Petitioners: John de Warenne, Earl Warenne. Reference: SC 8/87/4348". Accessed via The National Archives Discovery Online. Publication note: Calendar of Patent Rolls, Edw II, vol. III, 1317-1321, (Public Record Office, 1903), p.474 (commission of oyer et terminer to the justices mentioned in the petition, on complaint of John de Nerforde) & 537 (similar commission). Retrieved 15 July 2021.