Rising debt related to the terms of the Dictum of Kenilworth had led the Baron Devereux to financial arrangements permitting the alienation of Lyonshall Castle, the caput of the Barony.
William's cousin, Stephen Devereux of Bodenham and Burghope[1] tried to regain Lyonshall through seizing it by force in 1305, and bringing suit for its return.
Edward II's victory led to the death of Batholomew de Badlesmere and William Touchet, and brought Lyonshall Castle back into the King's hands.
When Roger de Mortimer escaped to France in August 1323, William Devereux remained loyal, but found himself among those suffering royal disapproval.
[10] When Roger Mortimer and Queen Isabella landed in England on 24 September 1326, William Devereux immediately rose in their support.
Following the abdication of Edward II on 24 January 1327, John de Felton requested its return, but under Mortimer's influence he was granted another castle of equal value.
[11] Inquiries into the rightful owner of the castle determined this to be Giles de Badlesmere, a minor who was heir of the Bartholomew killed above,[12][13] but Devereux retained possession.
Devereux was granted Letters of Protection for service in Scotland with Roger Mortimer on 4 June 1327,[15] and probably was present at the Battle of Stanhope Park in August 1327.
He cited that Lyonshall had been alienated following a grant for term of life disinheriting him, and now resided in the king's hand following the death of William Touchet.
Devereux also held for life a lease of the mill of Frome from the Prior and Canons of St. Leonards of Pyon, and this was surrendered upon his death.