The Corbets were a family of great antiquity. Two heads of the senior line, established at Caus in Shropshire, received personal summonses to Parliament between 1295 and 1322. The lands of this line passed to coheiresses before the middle of the fourteenth century, but by then the family had sprouted more than one cadet branch, the principal of which lived at Moreton Corbet, a few miles to the north of Shrewsbury.
Thomas Corbet thus stood heir to an important position in the politics of his native county, and it was one into which he came rather sooner than he might have liked. His father died when only in his mid-thirties, and Thomas, like his father before him, inherited the family patrimony several years short of his majority. According to the inquisition post mortem held at Shrewsbury on 9 Nov. 1420, he was just ten years old.
Thomas began to play a part in local affairs soon after his half-brother’s birth. In April 1427, while, if the earlier inquisition is to be credited, still short of his majority, he attested the county’s parliamentary election, and he acted again in the same role at the next four elections, appearing in June 1433 with Mallory.
Seemingly now at the beginning of a prominent career, it is not surprising that Thomas should have been able to marry well. By 24 Jan. 1435, when William Burley I*, as the last survivor of his father’s feoffees, made a jointure settlement on the couple (a settlement witnessed by Mallory), he had taken as his wife a niece of the Shropshire peer and soldier, John, Lord Talbot. In the following autumn, notwithstanding his youth, he was elected to Parliament in company with Burley, his stepfather numbering among the attestors.
