Sir John Oldcastle O, O!," when his fingertips are singed with candles — which of course works for "Oldcastle" but not "Falstaff." There is also the "castle" reference in IV,v,6 of the same play. The name Falstaff was derived from Sir John Fastolf, who was also a historical person—allegedly a greedy and grasping individual, who had a (probably undeserved) reputation for cowardice at the Battle of Patay in 1429. Fastolf, however, died without descendants, making him safe for a playwright's use. He had already appeared as a cowardly knight in Henry VI, part 1. The name change and the Epilogue disclaimer were required,
John Oldcastle at last consented to a prosecution. Oldcastle refused to obey the archbishop's repeated citations, and it was only under a Royal Writ that he at last appeared before the ecclesiastical court on 23 September 1413. In a confession of his faith he declared his belief in the sacraments and the necessity of penance and true confession, but he would not assent to the orthodox doctrine of the sacrament as stated by the Bishops, nor admit the necessity of confession to a priest. He also said the veneration of images was "the great sin of idolatry". On 25 September he was