Dickinson’s grandfather was a Bristol merchant with Jamaican interests and his father had purchased the Kingweston estate and other landed property in Somerset. He was the residuary legatee of his father’s estate, which included plantations in Jamaica and was sworn under £7,500.
He was a fairly regular attender who continued to act with the Whig opposition to Lord Liverpool’s ministry on most issues, including parliamentary reform, 25 Apr. 1822, 24 Apr. 1823, 27 Apr. 1826. He was a conscientious county Member, presenting petitions from various interests and serving on relevant committees. He was granted five weeks’ leave owing to the death of a near relation, 12 June 1820. He divided against Catholic claims, 28 Feb 1821. He strongly endorsed the claims for compensation from American loyalists who had ‘sacrificed their property’ through attachment to the British cause, 21 Mar. He supported inquiry into conditions at Ilchester gaol, 11 Apr., but disbelieved the allegations made against the gaoler and stated that as a magistrate he had personally conducted an inspection. He successfully moved to discharge the order for a copy of the visiting magistrates’ report, 21 June, acting as a majority teller. In announcing that he would not proceed with his intended sewers bill for improved land drainage, 11 Apr. 1821, he said he would move next session for a select committee instead and complained of the accusations of private interest made against the bill’s supporters in a pamphlet.
Dickinson attended both of the Somerset county meetings in January 1823. At the first, he repudiated Hunt’s assertions that he had ‘got a sly bit for himself’ out of excessive government expenditure, through his role as an officer in the yeomanry cavalry and his lease from the crown on favourable terms of the Flatholm lighthouse in the Bristol Channel. He supported the petition for relief from agricultural distress as ‘applicable to the situation’, but opposed calls for tithe commutation which would impoverish the church and clergy. At the second meeting, he again rebutted Hunt’s accusations of corruption and stated that, while he favoured some measure of reform, he was ‘against radical reform as contrary to the genius and spirit of the English constitution’.
He was prevented by illness from attending the debate on Catholic claims, 6 Mar. 1827, but it was reported that he would have voted against them.
In February 1829 Planta, the Wellington ministry’s patronage secretary, predicted that Dickinson would side ‘with government’ on Catholic emancipation. However, he presented several hostile petitions and twice voted against relief, 6 Mar., when he repeated his doubts that concession would satisfy the Irish Catholics but seemed reconciled to the government’s measure passing. He also expressed alarm at ‘the great increase of monastic institutions ... taking place in Somerset and other parts of the West of England’. He divided against the emancipation bill, 18, 27, 30 Mar., and the accompanying Irish franchise bill, 19, 20 Mar. He presented a petition from ‘a portion of the most distressed class of His Majesty’s subjects’, the silk-throwsters of Somerset, Dorset and Wiltshire, 9 Apr., and urged ministers not to ‘sacrifice an industrious people for a theory, nor apply the principles of free trade to a complex state of society that does not suit them’. He divided with the minority against going into committee on the silk trade bill, 1 May. He introduced a division of counties bill, 19 May, which received royal assent, 19 June (10 Geo. IV, c. 46). He voted with the minority to issue a new writ for East Retford, 2 June 1829. In February 1830 he accompanied a Bath deputation to the chancellor of the exchequer, Goulburn, representing their opposition to the assessed taxes.
The ministry regarded him as one of their ‘foes’, and he duly voted against them in the crucial civil list division, 15 Nov. 1830. He testified to the respectability of the Glastonbury petitioners for parliamentary reform, 2 Mar., but nevertheless divided against the second reading of the Grey ministry’s bill, 22 Mar. 1831. He excused himself from attending the Somerset reform meeting at Bridgwater, 28 Mar., owing to an attack of gout, but sent a letter explaining that he had opposed the bill because ‘he considered it unjust that Englishmen should be deprived of their privileges’. He approved of the increase in county Members, ‘inasmuch as it tended to strengthen the landed interest’, but strongly objected to the division of counties into ‘petty districts’, which would ‘give them too much the appearance of ... rotten boroughs’. He also feared that the registration provisions would lead to ‘vexatious annual litigation’. However, he expressed the hope that the bill might ‘receive such alterations as would make it a more moderate and less objectionable measure’, so that he could ‘vote for it on the third reading’.
