Edward Devereux, the younger brother of the 7th viscount, succeeded to the title at the age of eight. Like his brother, he remained under the care of his mother until her death in 1681, after which time he came under the protection of his father’s appointees: George Berkeley, earl of Berkeley (his father’s friend and overseer), and guardians Theophilus Hooke (whose personal financial interests were closely bound to those of the Devereux family), Edward Steynor, Charles Cocks, and Ipswich lawyers Thomas Edgar‡ (senior and junior).
While still a minor, Hereford was maintained financially from Devereux estates in Pembrokeshire. Hereford’s guardians also oversaw his marriage, at the age of 15, to the 12-year-old daughter (and wealthy coheiress) of Walter Norborne‡.
By 1692 the Devereux electoral interest at Orford had fallen into the hands of Sir Edward Turnor‡, an Essex squire who benefitted from the fact that the tiny borough had no single dominant influence during Hereford’s minority.
In what is probably confirmation that he had recently attained his majority, Hereford took his seat in the House of Lords on the first day of the autumn session, 20 Oct. 1696. On 26 Oct. 1696 he was named to the Lords committee to prepare an address to the king on the occasion of his speech to both Houses. As a politically active Tory, it was no surprise on 15 Dec. 1696 when he dissented from the resolution to read information in the attainder of Sir John Fenwick‡. Three days later he again dissented against the resolution that the bill be read for a second time. On 23 Dec. 1696 (like his cousin Price Devereux, later 9th Viscount Hereford, who was then in the Commons) he voted against Fenwick’s attainder, and registered his protest against the final vote. He attended the session for only a third of its sittings, absenting himself after 23 Jan. 1697 and entering his proxy in favour of his friend Thomas Jermyn, 2nd Baron Jermyn.
In the Orford by-election of March 1697, Hereford was willing to reach an accommodation with local Whig interests, but was unable to withstand the strength of external partisan pressure. He accepted the candidate sponsored by Jermyn though later withdrew his support when the candidate was accused of bribery; instead he threw his political influence behind the successful Sir John Duke‡.
Hereford attended the following session, in the winter of 1698, on only 11 occasions (around 14 per cent), arriving on the first day of business to take the oaths, but playing no prominent part in the business of the House. He again arrived for the first day of the winter 1699 session. With the Orford election petition being considered by the Commons, it is possible that Hereford spent that winter at Westminster lobbying for his party’s interest. On 1 Feb. 1700, it was thought likely that he would support the bill to continue the East India Company as a corporation. He attended the Lords on only 21 days (a little over a quarter of the session) up to 13 Feb. 1700, his last day in the House and three days after his Orford parliamentary candidates were successful (by a very narrow margin) in their petition to the Commons.
In August 1700, Hereford (like his father and older brother) died prematurely. He died childless and left his property in trust for his heir at law. His trustees were Leicester Martin‡ of Ipswich (an Ipswich Tory who was a distant relation by marriage) and Sir Charles Blois‡ of Yoxford, Suffolk, another staunch Tory and common councilman of Orford. Hereford’s heir, his only surviving sister Anne, shortly afterwards married Leicester Martin.
