Walter’s father and namesake was a retainer of the de Bohuns and sometime sheriff of Somerset and Dorset and of Herefordshire, as well as being an MP and j.p. for the latter county. They were closely related to John, Lord Devereux, a friend of the Black Prince and member of Richard II’s council of regency, who may, indeed, have been our Walter’s uncle.
As a King’s esquire, Walter served on Richard II’s expedition to Scotland in the summer of 1385. However, despite his membership of the royal household, he apparently did not side with the King during the political crisis of 1387-8. At any rate, he was appointed in March 1388 to administer to the notables of Herefordshire the oath of loyalty to the Lords Appellant. He may well have been following the lead of his presumed uncle, John, Lord Devereux, a prominent supporter of the opposition party and a member of their commission of government. Whether Walter remained at Court after this is unknown, but (having been knighted by 1391) he certainly accompanied Richard II to Ireland in September 1394, when he nominated Roger Wigmore and Thomas Oldcastle as his attorneys.
Apart from his commissions, comparatively little is known of Sir Walter’s later life. His single return to Parliament occurred in 1401, and it was only later that year, in May, that he was appointed as sheriff. By this time, the Welsh revolt under Glendower had broken out, and that same month Devereux was among those ordered to help raise the siege of Abergavenny. In the following year he joined Sir Edmund Mortimer’s expedition into Radnorshire, which culminated in a disastrous English defeat at the battle of Pilleth on 22 June. There Sir Walter was mortally wounded, and he died three days later.
