Fellowes’s grandfather and great-grandfather were London merchants, and he himself a comparative newcomer in Huntingdonshire. In 1754 he was returned unopposed for the county, together with Sandwich’s candidate, Lord Carysfort. In Dupplin’s list Fellowes was classed as an Opposition Whig. What line he followed after the Bedfords had rejoined the Government at the end of 1755, is uncertain: not one speech or vote of his is recorded in this Parliament.
In 1761 Lord Mandeville, son of the Duke of Manchester, having come of age, was a candidate; and on 12 July 1759 both Sandwich and Carysfort wrote to Bedford about the danger of a contest, and asked for his support.
A highly laudatory, yet not uncritical, character sketch of Coulson Fellowes, written toward the end of his life, was printed by John Nichols
He is a gentleman of great worth in all respects ... a man of extensive knowledge in almost all parts of learning ... well acquainted with the real interests of these kingdoms, their connexions in trade, commerce, and interest with other nations ...
Mr. Fellowes is generally allowed to be one of the best politicians in this kingdom, and an excellent calculator in matters of loss and profit. His successful management in regard to the public funds, where his own interest is concerned, demonstrates this. He is said to be (and very probably is) immensely rich. The principal fault which is ascribed to him is too much parsimoniousness ...
He travelled, in his younger days, into foreign parts; and was at Rome at the same time with Dr. [Conyers] Middleton,
For his travels see Nichols, v. 410-11. whom he often accompanied in viewing the curiosities of that city and the country surrounding it ... He is both ingenious, lively, cheerful, and extremely well versed in history, ancient and modern ... has also a considerable command of the classics. He is uncommonly absteminous ... drinks only water ...
He died 23 Feb. 1769.
