An ancestor of Marquess Cornwallis, the British commander who surrendered to the American rebels at Yorktown in 1781,
Cornwallis may have spent some of the next few years in London receiving a legal education, since he later practised as a lawyer.
It is also likely that Cornwallis lived for some of his early years in Essex, since he attested the return of its knights of the shire to the Commons of 1442, before settling in Suffolk, where he attended three subsequent parliamentary elections. He probably owed his own return to the Commons of 1449-50 to a combination of political circumstances and his own connexions. The East Anglian elections to this Parliament witnessed something of a reaction against the Court interest and the King’s chief minister, William de la Pole, duke of Suffolk, whom the Commons impeached the following February. Cornwallis’s fellow knight of the shire was John Howard*, the cousin of one of the duke of York’s allies, John Mowbray, duke of Norfolk. There is however no evidence of a link between the duke of Norfolk and Cornwallis, who was to be a member of a Suffolk jury that indicted the Mowbray retainer, Arthur Nowell, for trespass in February 1453.
Cornwallis won his seat in the Commons in controversial circumstances, for there was a contested election. Tellingly, the return lists no fewer than 159 attestors, an unusually high number, and a subsequent lawsuit shows that Sir Geoffrey Radcliffe* of Framsden had opposed his candidature. When the suit, heard in the court of common pleas, came to pleadings in Michaelmas term 1450, Radcliffe alleged that the defendant, Giles St Loe, sheriff of Norfolk and Suffolk in 1448-9, ought to have returned him, not Cornwallis, alongside Howard. He accused St. Loe of having breached the statutes of 1429 and 1445 regulating sheriffs’ conduct of parliamentary elections, by making a return that ignored the true wishes of the electorate. He therefore demanded that St. Loe should pay him £100, the sum awarded by the statutes against sheriffs who made false returns, and sought damages of £200. St. Loe contradicted these claims, declaring that a majority of the forty-shilling freeholders attending the shire court had in fact elected Cornwallis. The parties agreed to refer the matter to a jury but further legal process ensured the postponement of the intended trial. It had still not taken place in the autumn of 1452, when the court discharged the defendant because, for reasons now unknown, Radcliffe had decided not to prosecute his suit.
During this period, Cornwallis was also at odds with Alice de la Pole, duchess of Suffolk, despite the links which his grandfather, Robert Bukton, had enjoyed with her late husband’s family. An account of the widowed duchess’s receiver-general shows that she summoned (Sir) Philip Wentworth*, (Sir) Miles Stapleton*, Sir Thomas Tuddenham* and other prominent retainers to Eye, Suffolk, in August 1454, to discuss various trespasses he and his servants were supposed to have committed against her.
During his quarrel with Alice de la Pole, Cornwallis appears to have associated with Sir John Fastolf, an opponent of the de la Pole interest in East Anglia, since he witnessed a conveyance of property in Suffolk on the knight’s behalf in May 1457.
During the mid and later 1460s, Cornwallis was associated with Margaret, widow of another of his wife’s cousins, William Tyrell I*, who had been executed for treason in 1462, and with Margaret’s brother, (Sir) Robert Darcy II*, in two lawsuits at Westminster. Both suits concerned the manor of ‘Fitzjohns’ in Rickinghall, Suffolk, at one time the property of the Fitzjohn family and afterwards acquired by John Rickinghall, bishop of Chichester (d.1429). In one of these actions, heard in the common pleas, the plaintiffs were Sir Thomas Bourgchier (a younger son of the earl of Essex) and Robert Wimbill†. When their suit came to pleadings in Michaelmas term 1466, they accused the defendants, Cornwallis and Margaret, of having wrongfully entered the manor in May 1464. Bourgchier and Wimbill claimed to hold it by virtue of a conveyance from the bishop’s nephew and heir John Manning; Cornwallis and his co-defendant asserted that following the bishop’s death it had passed by means of several conveyances to Margaret’s late husband, William Tyrell, who subsequently had conveyed to Cornwallis and Sir Robert Darcy.
Apart from the likes of Darcy and the Tyrells, Cornwallis had other prominent Essex associates, including Sir John Marney, (Sir) Lewis John* and his son, Lewis John alias Fitzlewis* and Sir Thomas Montgomery†.
As this case indicates, Cornwallis made (or at least had intended to make) a will, but neither this nor any subsequent will has survived. He died on 26 May 1485, leaving as his heir his son, John, then some 30 years of age. Later that year the Crown instructed the escheators in Essex and Suffolk to enquire into his lands in those counties,
