Walter Devereux (1387–1419)
Walter Devereux assumed a position in the retinue of Henry IV following the death of his father on 25 July 1402 at the Battle of Pilleth. On 13 December 1402 Sir Edmund Mortimer declared his rebellion against Henry IV, but Devereux stayed loyal to the king. He was probably present at the Battle of Shrewsbury on 21 July 1403, and subsequently was knighted. Sir Walter Devereux was placed on a Commission of array for Herefordshire on 8 September 1403 to raise troops for the defense against the king’s enemies who have lately invaded the realm. It is probable that Devereux was present when Henry IV faced off with a combined Welsh and French force in South Wales during the summer of 1405, but no major battle occurred and the English force had dispersed by October of that year. Devereux remained an important supporter of the efforts to suppress the rebellion in Wales as Prince Henry assumed responsibility for the fight. Walter Devereux would be among 14 men below the rank of baron who would be retained for life by Prince Henry (the future Henry V).
Walter Devereux (died 1402)
On 10 November 1388 Walter Devereux witnessed John de Cornewaile of Kinlet’s grant of warranty for life to Cornewaile's mother of two thirds of the manor of Ashton, Herefordshire, if she should outlive his father, Sir Brian. On 28 June 1390 he was place on a commission of Oyer and terminer in addition to his role as Justice of the Peace for Herefordshire. On 15 July Devereux was on the commission conducting the inquiry post-mortem of John Hastings, 3rd Earl of Pembroke, who had died before coming of age. He was directed to inquire what lands had been held in dower at the death of the earl's widowed mother, Anne Manny, on 3 April 1384, and the widow of Aymer de Valence, 2nd Earl of Pembroke, Marie de St Pol, on her death 16 March 1377. On 27 October 1391 there were adjustments to the rent of the lordship of Bergevenny based on his findings.