Munro, a staunch Presbyterian and Hanoverian, like the rest of his family, was educated at a nonconformist school in Northampton, kept by his father’s friend, Dr. Doddridge, who subsequently published an account of the family. In May 1745 he wrote from London to Duncan Forbes, asking him to support his father, then commanding the Black Watch in Flanders, for the county seat, vacated by the death of Charles Ross at Fontenoy in April. ‘By a seat in Parliament my father may be able ... to procure me a civil post’.
Under Pelham’s plan for the 1747 Parliament Munro exchanged Ross-shire for Tain Burghs, where Sir John Gordon raised an unexpected but unsuccessful opposition.
