Sir John Oldcastle to Henry Carey's son George, second Lord Hunsdon, and the actors regained their previous patronage. Soon after the premier of Shakespeare's Oldcastle/Falstaff in 1597–98, literary and dramatic works began to appear that defended the reputation of the historical Oldcastle; scholars argue that the muse that inspired these works was Henry Brooke, 11th Baron Cobham. In 1601 a narrative poem, "The Mirror of Martyrs," by one John Weever, was published; it praises Oldcastle has a "valiant captain and most godly martyr." And two years earlier, in 1599, the play "Sir John Oldcastle" was performed by the Admiral's Men, the main theatrical
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