Bertie is best known as the ‘Col. B.’ of the diaries of his friend John Byng, in which he figured as a restless traveller ‘who cannot endure a day in a place’, of insatiable ‘family curiosity’ in his tours of Lincolnshire, ‘from choice and ill health driving himself in a phaeton’. Those idyllic days ended abruptly with Bertie’s responsibility for raising a regiment of volunteers, and his marriage: he was, as Byng put it, ‘translated like Enoch’.
In 1801 Bertie was Lord Exeter’s nominee for a vacant seat for Stamford, a borough which his family once controlled. He was connected by marriage as well as by neighbourhood to Lord Exeter. He was an inactive Member, no speech of his being known. He voted against Addington on defence, 23 and as Apr. 1804, 25 and was listed a follower of Pitt in September. Recommending him to the King for the command of the 77th regiment, 14 June 1804, the Duke of York added that he had reason to believe ‘that the difference of emolument is of great consequence’.
