It is tempting to identify this MP with the Hertfordshire knightly family of Thornbury and assume that he was a son of Sir Philip Thornbury*, MP for that county on three occasions between 1417 and 1426. This temptation is, however, to be resisted. A settlement made in 1457 strongly implies that Sir Philip had only one son, Richard, then living, and although our MP is known to have had a brother Richard, his brother was alive as late as 1488 whereas Sir Philip’s son died ‘ex morbo pestilenciali’ in 1458.
The acquisition of the manor of Ospringe established Thornbury among the Kentish gentry, and in the parliamentary subsidy of 1435 he was assessed as having lands worth £20 p.a. in the county.
More responsibility followed and throughout the 1440s Thornbury proved himself a valuable servant of both the Crown and the cardinal. He remained active in the administration of all those counties in which he had interests. In 1441-2 he served as escheator of Essex and Hertfordshire, perhaps reflective of connexions with the knightly family in the latter county, and in November 1445 he was pricked as sheriff of Kent. In 1446, before the end of his shrievalty, he purchased a general pardon as bailiff of the liberties of Cardinal Beaufort.
Even after Beaufort’s death in April 1447 Thornbury maintained his connexion with the cardinal’s family, and he may have resumed a military career. In 1448 he took out letters of protection as travelling to Normandy in the retinue of the recently-appointed lieutenant there, the cardinal’s nephew, Edmund Beaufort, duke of Somerset.
In July 1450 Thornbury took the opportunity to buy the general pardon offered in the wake of Cade’s rebellion, but it seems unlikely that he took any active part in the uprising.
Although by Michaelmas 1454 Thornbury had relinquished the receivership of Milton and Marden in favour of the local Exchequer clerk, Richard Appultrefeld, his Lancastrian credentials led to him being summoned to the Great Council intended to meet at Leicester on 21 May 1455.
There is no evidence that Thornbury took an active part in the civil war of 1459-61, but little reason to doubt that his strong sympathies lay with Lancaster. Not only did he serve Queen Margaret and the Lancastrian Bishop Waynflete (under whom he retained his position as bailiff of the episcopal liberties in Hampshire), but he had a close family connexion with at least one other committed Lancastrian. His only child, a daughter named Philippa, had first married John Pympe of Nettlestead, a member of one of Kent’s most ancient gentry families, but on his death in 1454 she had made an even better match to the Essex knight, (Sir) William Tyrell II*, a staunch Lancastrian and servant of the Staffords.
Almost nothing is known of Thornbury in the 1460s. Several matters conspired to diminish his standing. The political eclipse, albeit a temporary one, of Waynflete; what were probably perceived his own Lancastrian sympathies; and, perhaps most pertinently, the loss of the lands of his third wife with her death in 1460. He sued out general pardons in May 1462 and April 1469, but most of what is known concerns litigation.
Another matter much more directly concerned Thornbury’s interests towards the end of his life. The heirs of his second wife had become impatient that they were for so long being kept out of her manor of Ospringe. According to an inquisition post mortem, taken at Dartford on 8 Nov. 1472, they, the descendants of her brother Thomas St. Cler (d.1435) – namely Thomas’s daughter, Elizabeth Lovell, and his grandsons, William Gage and Christopher Harcourt – had entered the manor on 20 Feb. 1471, only to be expelled four days later by our MP.
After her father’s death, Philippa married again into one of Kent’s leading families. Her third husband was Sir John Guildford†, son of Edward Guildford* and widower of one of the daughters of Cardinal Beaufort’s servant, Richard Waller.
