Chatterjee was an Indian delegate to the London Naval Conference of 1930 , and led the Indian delegation at the Ottawa Imperial Conference in 1932 . From 1921 to 1924 , he was the Industries Member on the Viceroy 's Executive Council , and served as the High Commissioner to the UK from 1925 to 1931 , after which he served on the Council of India until 1936 . From 1938 to 1946 , he served as Chairman of the Permanent Central Opium Board of the League of Nations , also serving as an adviser to the Secretary of State for India from 1942 to 1947
Ottawa Imperial Conference
British Empire Economic Conference
Atul Chandra Chatterjee