A Kentish man who owed his connexion with Buckinghamshire to his wife’s estates in that county, Singleton advanced himself in the service of Archbishop John Kemp, a leading figure in both Church and state. Little is known about his family, which took its name from Singleton in the parish of Great Chart near Ashford, but he was probably the son of John Singleton. A minor gentleman with lands in Great Chart and Wye, John had a real estate valued at £20 p.a. when he was assessed for taxation in 1412.
Thomas Singleton is first heard of in the late 1420s. In January 1429 the manors of Irchester in Northamptonshire and Carlton, which straddled the Northamptonshire-Bedfordshire county boundary, were settled upon him and his wife Agnes and their children, probably shortly after their marriage. The manors, which came to Agnes from her father’s family, were not the only properties she brought to Singleton, since she also inherited more at Hartwell, Little Hampden and Hanslope in Buckinghamshire and at Northchurch in Hertfordshire after her mother’s death.
Still ‘of Kent’ when he acted as a mainpernor for other gentry from that county in February 1433,
The release was made while the Parliament of 1445, to which Singleton had accompanied Kemp, was still in session. His attendance on the archbishop at Westminster very much served his own interests, since it afforded him immunity from a suit that Sir Henry Brounflete, a former esquire of the chamber of Henry IV and an influential servant of the Lancastrian dynasty, had brought against him in the Exchequer.
Even though, thanks to his wife’s estates, Singleton was easily qualified to enter the Commons as a knight of the shire, he is likely to have enjoyed the backing of his patron, now serving a second term as chancellor of England, when he stood for election to the Parliament of 1450. Late in the first session of this assembly, he was among those to whom the Crown granted licence to found a guild at Aylesbury, the nearest town to his principal manor at Hartwell. The grantees were headed by Cardinal Kemp, who was probably involved at Singleton’s behest since he had no obvious connexions with Buckinghamshire.
The by now elderly Kemp did not long survive Stafford, for he died on 22 Mar. 1454. Shortly after losing his patron, Singleton faced renewed litigation from Sir Henry Brounflete in the Exchequer. In Michaelmas 1454, shortly before beginning his second term as sheriff, he responded by pleading (through his attorney) that he had received a receipt from Brounflete, acknowledging payment of his annuity, ten years earlier. The case was referred to a jury but does not seem to have reached a conclusion. In mid 1455 Brounflete brought a fresh bill in the Exchequer, this time to claim that his annuity was still £15 in arrears. This latter suit was successful, for Singleton was ordered to pay him both the sum demanded and damages of 13s. 4d.
It was also during his second term as sheriff that Singleton was sued by the London mercer, Walter Aleyn. Aleyn’s suit, likewise heard in the Exchequer, arose from a bond for £20 which the Buckinghamshire esquire, Bernard Brocas, had given him. He alleged that Singleton had deliberately ignored a royal writ ordering him to bring Brocas to Chancery to answer the bond, a plea to which Singleton responded by seeking permission to treat with his opponent out of court. Agreeing to this request, the barons of the Exchequer licensed the parties to negotiate: it was the first of several such licences and it seems the matter was settled privately.
While sheriff, Singleton purchased a royal pardon dated 1 Oct. 1455. It would appear to have had no connexion with the shrievalty since it refers to him as the former escheator of Bedfordshire and Buckinghamshire rather than as sheriff.
By 1461 Agnes had remarried, taking for her new husband Henry Petit. Seven years later, she and Petit were embroiled in litigation in the court of common pleas where a London fishmonger claimed that Singleton had died owing him just over 70s. This plaintiff was named John Kemp but his relationship, if any, with the MP’s late patron is not known.
