He was born on February 7 1897 in Chelsea, London, England and died on February 22 1984 in Comberton (near Cambridge), Cambridgeshire, England
He heavily involved in the design of the Colossus computer, used to crack the Lorenz? code in World War II.
He wrote Elements of the topology of plane sets of points, a definitive work on general topology. He also made major contributions to [combinatory topology]?.