 On 12 February 1469 he was commanded to deliver prisoners to the gaol of Hereford Castle.On 22 May he was appointed to a commission of Oyer and terminer for the counties of York, Cumberland, and Westmoreland; and the city of York.He was probably at the Battle of Edgecote Moor on 26 July 1469 when the Earl of Warwick defeated King Edward, and Devereux's brother-in-law, William Herbert, was killed.