Buller came from an old parliamentary family, established in Cornwall since the sixteenth century, who had acquired the Downes estate through marriage in the early eighteenth century. His distinguished academic career included a first in classics and a fellowship of All Souls. He inherited his father’s real property and the residue of his personal estate, which was sworn under £25,000, in 1827.
The ministry listed him among the ‘good doubtfuls’, but he was absent from the crucial division on the civil list, 15 Nov. 1830. Later that month he replied to an Exeter requisition by promising to support repeal of the coal duty and the house and window duties, but he was undecided ‘whether I can with propriety support the repeal of the remaining portion of the assessed taxes’.
He divided for the second reading of the reintroduced reform bill, 6 July 1831, and generally supported its details. However, he voted against the disfranchisement of Downton, 21 July, and to transfer Aldborough from schedule B to A, 14 Sept. He pointed out that East and West Looe were ‘but one town’, 22 July. He considered the Exeter freemen’s petition for the preservation of their voting rights to be compatible with the principles of the bill, 4 Aug., but he was ‘so convinced of the general benefits which [it] is calculated to bestow, that I am prepared to take it even as it stands’. He voted for the bill’s passage, 21 Sept., the second reading of the Scottish bill, 23 Sept., and Lord Ebrington’s confidence motion, 10 Oct. He attended the Exeter reform meeting, 15 Oct., when he ‘rejoiced that ... ministers had not resigned in disgust’ after the Lords’ rejection of the bill.
Buller was again returned for Exeter at the head of the poll in 1832 and sat as an advocate of ‘Whig principles’ until his defeat in 1835.
