Original: John Stuart , 3rd Earl of Bute , KG , PC ( 25 May 1713 10 March 1792 ) , styled Lord Mount Stuart before 1723 , was a Scottish nobleman who served as Prime Minister of Great Britain ( 1762 1763 ) under George III , and was arguably the last important favourite in British politics .
Simplified: John Stuart , 3rd Earl of Bute , KG , PC ( 25 May 1713 - 10 March 1792 ) was a Scottish nobleman .