Robert Wilson (dramatist) character in the original versions of William Shakespeare's plays "Henry IV, Part 1" and "Henry IV, Part 2". Objections from descendants of the historical John Oldcastle, a Protestant martyr, appears to have been responsible both for the writing of the corrective "Oldcastle" play and the alteration of Oldcastle to Sir John Falstaff in later versions of the "Henry IV" plays. Also, Wilson has been proposed as a possible author of several anonymous Elizabethan plays, including "Fair Em", "The Pedlar's Prophecy", "A Larum for London", "Look About You", "Sir Clyomon and Sir Clamydes", and "A Knack to Know a Knave". As
John Oldcastle death of Henry IV, Oldcastle was at once accused of heresy. But his friendship with the new King Henry V prevented any decisive action until convincing evidence was found in one of Oldcastle's books, which was discovered in a shop in Paternoster Row, London. The matter was brought before the King, who desired that nothing should be done until he had tried his personal influence. Oldcastle declared his readiness to submit to the king "all his fortune in this world" but was firm in his religious beliefs. When Oldcastle fled from Windsor Castle to his own castle at Cowling, Henry