Francis Dashwood , 15th Baron le Despencer ( December 1708 -- 11 December 1781 ) was an English rake and politician . He was Chancellor of the Exchequer ( 1762-1763 ) and founder of The Hellfire Club . Francis Dashwood , 15th Baron le Despencer ( December 1708 -- 11 December 1781 ) was an English rake and politician , Chancellor of the Exchequer ( 1762 â `` 1763 ) and founder of the Hellfire Club .