J. Kimber, steward of Philip Rashleigh, wrote to him 16 Mar. 1777: ‘Sir John St. Aubyn hath never given his friends any room to expect great things from him. I hope, however, what we see in the public papers may not prove true.’
Politically he was insignificant. He was returned for Truro, and next for Penryn, on the interest of his first cousin, Sir Francis Basset, whom he followed in joining the Opposition: he voted with them in every single division for which lists are extant 1784-90. There is no record of his having spoken in the House before 1790.
St. Aubyn died 10 Aug. 1839, s.p. legit., and the baronetcy became extinct.
