Blair was born and raised in Ulster, but his family ties and interests lay in Wigtownshire and the estates in Berbice, Demerara and Surinam which he inherited in 1815 as coheir of his paternal uncle Lambert Blair, whose sister-in-law he subsequently married.
Ministers should throw more decision into their measures, and let us know how far they mean to go. I conceive that unless a line be drawn and unless we are told where concession is to stop, the negroes will never enjoy quiet, nor the planters that undisturbed possession of their property, to which they are by law entitled.
As an East and West India proprietor, he had written to Lushington in 1823 to criticize a proposal for levying the same duty on West and East Indian cotton wool:
This involves the question of protection, regarding which in sugar the interests of the two Indies are at variance, and I hope the principle will not be infringed as to one commodity unless it be found expedient to renounce it in all.
TNA T64/261, Blair to Lushington, 9 Mar. 1823.
He spoke unequivocally for a preferential tariff on West Indian sugars when equalization was proposed, 18 Mar. 1825. He voted against inquiry into the indictment in Demerara of the Methodist missionary John Smith, 11 June 1824, and against condemning the Jamaican slave trials, 2 Mar. 1826. The Walkers had sold Aldeburgh to the 2nd marquess of Hertford in 1822, and at the general election of 1826 Blair was returned on the Fownes Luttrell interest for Minehead, where Hertford’s nominee John Douglas was ‘retired’.
He cast his customary vote against Catholic relief, 6 May, divided with government for the grant to the duke of Clarence, 16 Mar., but probably voted in a minority of seven against the committal of Thomas Flanagan to Newgate, 19 June 1827. He voted against repeal of the Test Acts, 26 Feb. 1828, but held aloof from the 1828-9 debates on Catholic emancipation. He voted to defeat Robert Grant’s Jewish emancipation bill, 17 May 1830. He stood down at the dissolution that summer. He had been cultivating a political interest among local Tories from his Wigtownshire seat since 1829 with a view to representing the county and, although unsuccessful there in 1835, he was returned in 1837.
