The son of a woollen draper, who became factor to the South Sea Company, Rigby inherited as a minor an estate in Essex, with a rent roll of £1,100 a year.
to think it sensible to laugh at the shackles of morality, and having early encumbered his fortune by gaming he found his patron’s maxims but too well adapted to retrieve his desperate fortunes.
Walpole to Hanbury Williams, 25 June 1746; Mems. Geo. II, iii. 66-67.
After Winnington’s death in 1746, Rigby, like Horace Walpole, went over to the Prince of Wales, who
promised to assist him with £1,000 if he would go down to stand for Sudbury on his interest, which he did, and though so populous a town, and in which he did not know one man, he carried his election
Corresp. H. Walpole (Yale ed.), xxx. app. 5.
against a government candidate, much to Pelham’s annoyance.
In addition to the £1,000, of which only £900 was paid, Frederick had promised to make Rigby a groom of his bedchamber, but, after keeping him waiting for two years, gave the post to William Trevanion in 1749.
