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 in the parliament of 1404, later serving as a justice of the peace, and was High Sheriff of Herefordshire in 1406–07. In 1408 he married Joan, the heiress of Cobham — his third marriage, and her fourth. This resulted in a significant improvement of his fortune and status, as the Cobhams were "one of the most notable families of Kent". The marriage brought Oldcastle a number of manors in Kent, Norfolk, Northamptonshire and Wiltshire, as well as Cooling Castle, and from 1409 until his accusation in 1413 he was summoned to parliament as Lord Cobham. At some point in his