Sir John Oldcastle pentameter verse lines in both parts are irregular when using the name "Falstaff," but correct with "Oldcastle." Finally, there is the blatant disclaimer at the close of "Henry IV, Part 2" that disassociates the two figures: "for Oldcastle died [a] martyr, and this is not the man" (Epilogue, 29-32). There is even a hint that Falstaff was originally Oldcastle in "The Merry Wives of Windsor" too. When the First Folio and quarto texts of that play are compared, it appears that the joke in V,v,85-90 is that Oldcastle/Falstaff incriminates himself by calling out the first letter of his name, "O,
John Oldcastle John Oldcastle, was Herefordshire's MP during the latter part of the reign of King Richard II. Oldcastle is first mentioned in two separate documents in 1400, first as a plaintiff in a suit regarding the advowson of Almeley church, and again as serving as a knight under Lord Grey of Codnor in a military expedition to Scotland. In the next few years Oldcastle held notable positions in the Welsh campaigns of King Henry IV of England against Owain Glyndŵr, including captaincy first over Builth Castle in Brecknockshire and then over Kidwelly. Oldcastle represented Herefordshire as a "knight of the shire"