Douglas, whose father had established his claim to the estates of the dukes of Douglas in 1769 and been created a baron in 1790, was described as a ‘judicious man of business’, who managed the vast estates of his ward, the 5th duke of Buccleuch.
The ministry regarded him as one of their ‘friends’, and he voted with them in the crucial civil list division, 15 Nov. 1830. He condemned the Grey ministry’s English reform bill as ‘calculated most unnecessarily to risk the security of the settled institutions of the country’, 9 Mar. 1831, and called for details of the plan for Scotland, where the people were ‘under the present system contented and prosperous’. He thought it would be ‘better by gentler and gradual means to remedy existing blemishes, than ... resort to a sweeping measure’. He divided against the second reading, 22 Mar. He supported Dunbartonshire’s ‘fair claim for separate representation’, 14 Apr. He confirmed his ‘decided opposition’ to the bill, as ‘the principle of disfranchisement ... pervades it’, 19 Apr., and warned that ‘if we change the electors we shall change the elected, which I cannot think for the benefit of this country’; he voted that day for Gascoyne’s wrecking amendment. He presented and concurred in a Glasgow petition against revision of the timber duties, which would be ‘detrimental to the commercial, the shipping and the colonial interests of this country’, 15 Mar. In presenting a petition from vessel owners in the Firth of Forth against the proposed tax on steam navigation, 29 Mar., he suggested that any tax should be levied on the tonnage of vessels rather than on the number of passengers, who were ‘one of the greatest sources of profit in the trade’. He believed that ‘we owe it to our sense of what is due to the dignity of the crown’ to support the civil list bill, 14 Apr. He offered again for Lanarkshire at the general election in May 1831 and faced a riotous crowd when he appeared on the hustings, being pelted with stones and cut by a broken glass. He complained that the Scottish reform scheme was ‘an attempt to assimilate our elective franchise too rapidly to the forms and standard of England’. However, he disapproved of the existing county franchise and favoured extending it to ‘owners of the soil’, without specifying what the valuation threshold should be. He also expressed his ‘cordial concurrence’ in the granting of separate representation to Glasgow and other rapidly expanding towns, but not at England’s expense, and thought the burgh franchise might be extended in some unspecified way. Following his victory over Maxwell’s son, the sheriff was forced to read the Riot Act and call in the cavalry. In a published address, he pledged himself to oppose ‘the extravagance of theorists’ in order to ‘ensure reasonable and practical measures of improvement’.
He deplored the ‘extremely improper ... attack’ made by Members on the sheriff of Lanarkshire for his conduct of the election, 29 June 1831. He voted against the second reading of the reintroduced English reform bill, 6 July. He divided for an adjournment motion, 12 July, before pairing for the rest of the night with John Cam Hobhouse.
Douglas succeeded his brother to the barony in 1844. He died in 1848 and was succeeded by his half-brother, the Rev. James Douglas (1787-1857), on whose death the title became extinct. His personalty was sworn under £4,000 within the province of Canterbury.
