Little is known of Morris’s antecedents. His father served as sheriff of Gloucestershire in 1781 and the following year bought the Barnwood estate from the Johnson family. By the time he made his will, 29 Mar. 1788, Robert was in possession of Barnwood. In addition, his father, who died 5 June 1788, left him a freehold estate at Quedgley, also near Gloucester, while a recently purchased property in the parish of Standish went to his younger brother William.
Morris was active in the civic affairs of Gloucester by the early 1790s and became a partner in the local banking house of Turner & Co. When a vacancy occurred for the city in July 1805 he stood, stressing his local connexions, as a self-styled ‘independent’ candidate, against Lord Arthur Somerset, son of the Pittite Duke of Beaufort. He had a comfortable victory, having enjoyed the discreet support of the Whig corporation, though Lord Ellenborough told Lord Sidmouth, 13 Aug., that he believed Morris would ‘vote in general on the same side’ as the Somersets.
He is not known to have opposed the ‘Talents’, but neither did he vote for the motions regretting their dismissal in April 1807, when he had a month’s leave of absence.
