Gilbert inherited his maternal grandfather’s Cornish farm on the death of his father in 1814,
He continued to attend assiduously, giving general support to Lord Liverpool’s ministry, making frequent contributions to debate and serving on several select committees each session. He declared himself a ‘decided advocate for the principle of representation upon property rather than population’, 19 May 1820, and warned that the transfer of Grampound’s seats to Leeds would be the ‘first step towards a new-fangled and dangerous system’ that would ‘speedily sweep away’ the aristocracy and the monarchy. On 5 June he moved to extend Grampound’s franchise to freeholders of the surrounding hundreds of Pyder and Powder and to remove it from those electors who were guilty of taking bribes, but the debate was adjourned. He was a minority teller for the second reading of the Sussex election bill, 23 June. He introduced the population of Great Britain bill, to conduct a census, 16 June;
It was thought to be Gilbert who declared, 7 Feb. 1822, that he had ‘no objection to some strong measures for ... putting down the present outrages’ in Ireland, but warned that ‘unless ... accompanied by measures of conciliation’ they would merely ‘increase the irritation that prevailed in that country’. Convinced that peace could never be achieved without the ‘total abolition’ of the tithes system, he argued against giving ‘extensive power’ to the magistrates, as many of them were not ‘respectable’; to opposition cheers, he maintained that ‘in Ireland justice was bought and sold’.
He considered the Tregony election return illegal, but did not blame the sheriff, 24 Nov. 1826. He presented two Sussex petitions against altering the corn laws, 19 Feb., 2 Apr.,
Gilbert’s sense of impending social danger was reinforced in the autumn of 1830 when hayricks on his Sussex estate were burned.
He was absent from the division on the second reading of the revised reform bill, 17 Dec. 1831. Early in 1832 he wrote despairingly about the state of the country:
Pestilence now actually beginning to rage ... and a servile war impending, with the view of obtaining objects beyond human reach, principally with the hope of attaining the products of labour without work and ... capital, and in addition to these evils, the gaudy iris of indefinite perfectibility dazzling the eyes of those who should see the true interests of mankind ... Oh Lord God, have mercy upon us.
Todd, 270.
He thought it was ‘evident’ that the reform bill ‘must pass’, 1 Feb., and said he would not oppose it ‘in toto’. He wished to ensure that only those with ‘such a stake in the country as will make them consider maturely the effects of any vote they may give’ were enfranchised, and considered the £10 household franchise to be ‘too low a qualification’ in the large towns. He therefore moved, 3 Feb., to deduct the value of under-lettings from house valuations, as ‘the lowest description of persons that can be imagined are those who take houses ... for the purpose of letting out into floors’. However, Althorp deemed this to be impracticable, and the amendment was negatived. He admitted that as an ‘abstract mathematical question’, Lieutenant Drummond’s method of scheduling the boroughs (which reprieved both Bodmin’s seats) was ‘ingenious’ and ‘unobjectionable’, 20 Feb. He was absent from the division on the bill’s third reading, 22 Mar., and left the House before the division on Lord Ebrington’s motion for an address asking the king to appoint only ministers committed to carrying an unimpaired measure, 10 May.
Gilbert was unwilling to face a contested election and retired from Parliament at the 1832 dissolution. He continued to pursue his other interests, serving again as vice-president of the Royal Society, helping to form the British Association and publishing a four-volume Parochial History of Cornwall. His ‘humility and diffidence’ contributed to his subsequent obscurity, and it was said of him that ‘he communicated largely to the wants of others from his own great stores of knowledge, and shone more by those reflected lights than by the direct diffusion of his rays’.
