Robert Buchanan (1802–1875) was a Scottish Presbyterian minister and historian who served as Moderator of the General Assembly to the Free Church of Scotland in 1860/61. He was one of the leading figures in the Disruption of 1843. He had correspondence with several notable figures of the day over many years: Lord Aberdeen; Sir Robert Peel; Thomas Chalmers from 1834 to 1845; and George Combe from 1821 to 1827. Source: Wikipedia (en)