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 military career Oldcastle became a trusted supporter of Henry, Prince of Wales, later to become King Henry V, who regarded Sir John as "one of his most trustworthy soldiers". Oldcastle was a member of the expedition which the young Henry sent to France in 1411 in a successful campaign to assist the Burgundians in the Armagnac-Burgundian Civil War. Lollardy had many supporters in Herefordshire, and Oldcastle himself had adopted Lollard doctrines before 1410, when the churches on his wife's estates in Kent were laid under interdict for unlicensed preaching. In the convocation which met in March 1413, shortly before the