When Sir John Rous died on 31 October 1771, Holt stood for Suffolk again, apparently with support from Grafton and the Administration, against
Rous's son, who withdrew from the contest at the county meeting at Stowmarket on 13 November. Holt was returned unopposed in a by-election on 18 December 1771. In the
1774 general election he was again returned unopposed. In
1780 there was the prospect of a contest, but Holt, who seemed unwilling to take part in contested elections, withdrew, and never stood for Parliament again. There is no record of his having spoken in the House during the 18 years he was a Member. ==Later life==