Returned on the Atholl interest for Perthshire on coming of age, Murray, Queen Anne’s godson, voted with the Government in every recorded division. After serving in Germany as a.-d.-c. to the King in 1743, he obtained in 1745 the colonelcy of the Black Watch, to which the Rev. (later Professor) Adam Ferguson was appointed Gaelic speaking chaplain, ‘to be a kind of tutor or guardian to Lord John ... to gain his confidence and keep him in peace with his officers, which it was difficult to do’.
He died 26 May 1787.
