John Oldcastle alive. His heretical opinions and early friendship with Henry V created a traditional scandal which long continued. In the old play "The Famous Victories of Henry V", written before 1588, Oldcastle figures as the Prince's boon companion. When Shakespeare adapted that play in "Henry IV, Part 1", Oldcastle still appeared, but when the play was printed in 1598, the name was changed to Falstaff (modelled after John Fastolf), in deference to one of Oldcastle's descendants, Lord Cobham. Though the fat knight still remains "my old lad of the Castle", the stage character has nothing to do with the Lollard leader.
John Oldcastle Lollard plots of 1416, and appears to have intrigued with the Scots also. In November 1417 his hiding-place was at last discovered and he was captured by Edward Charleton, 5th Baron Cherleton. Some historians believed he was captured in the upland Olchon Valley of western Herefordshire adjacent to the Black Mountains, Wales, not far from the village of Oldcastle itself in his family's old heartlands. Modern historians believe that he was hiding with some Lollard friends at a glade on Pant-mawr farm in Broniarth, in Wales called Cobham's Garden. The principal agents in the capture were four of the tenants