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John Howard Blackwell (c1832-1866) of John Howard Blackwell and Co
ca.1832 Born in Bristol the son of Samuel Blackwell and his wife Hannah Lane
1855 of Smethwick Iron Works, Smethwick
1866 February 12th. Died. 'aged 34, John Howard Blackwell, Esq., late Mining Engineer to the Bombay Government.
1867 'John Howard Blackwell, formerly of No. 3, Eastbourne-terrace, but late of No. 75, Jermyn-street, in the county of Middlesex, Mining Engineer, deceased (who died on the 12th day of February, 1866' and mentions John Kenyon Blackwell, of the city of Paris, in the Empire of France'