Montgomery, the son and heir of a lord chief baron, who had been the last resident of Queensberry House in Edinburgh’s Canongate and kept a black servant called Hannibal, was an undistinguished lord advocate in Pitt’s second ministry, the possessor of a sinecure worth £610 a year and a ‘steady adherent’ of the 1st and 2nd Lords Melville.
Montgomery continued to sit unopposed for Peeblesshire on the family interest. Melville thought he had ‘a fair claim as an active and resident vice-lieutenant’ to the vacant lord lieutenancy in October 1820, but he was not appointed.
