John Humphrey Blackwell:

He was born on the 25th April 1895 and was educated at Bedford School. In the first Great War of 1914-1918 he saw continuous service-in France from 1915 to the beginning of 1919, receiving the Military Cross and Bar as well as being Mentioned in Despatches. In 1920, when serving with the 2nd Bedfordshire and Hertfordshire Regiment at Secunderabad (Deccan), he left the Army to join the Asiatic Petroleum Co. (India) Ltd. He became Manager of Messrs. Burmah-Shell’s Karachi Office which controled the whole of north west India including the Province of Sindh, the Punjab and N.W.F.P., Baluchistan, Rajputana and Afghanistan.
In 1935 he became a member of the Central Assembly and since coming to Sindh had been Chairman of the Karachi Chamber of Commerce (1939-’40 and 1943-44) and of the Sindh Branch of the European Association (1940-41). He was also a Justice of.Peace., a Member of Karachi Port Trust Board, its present Vice-Chairman.(Source: ‘The Colourful Personalities of Sindh’, by M.U.Abbasi).