Sir Archibald Sinclair Born 22nd October 1890 - Died 15th June 19701st Viscount ThursoLiberal MP for Caithness & Sutherland 1922-45Liberal Chief Whip 1930-31, Deputy Leader of the Liberal Party 1931-35, Leader of the Liberal Party 1935-45Secretary of State for Scotland 1931-32, Secretary of State for Air 1940-45