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William Thomas Tutte. 14 May 1917 — 2 May 2002

D. H. Younger


William Tutte, born in Newmarket, completed a master’s degree in chemistry at Cambridge at the end of 1940, whereupon he was recruited to work at Bletchley Park as a cryptographer. He became the primary person responsible for breaking the Fish code used for high-level Army communication. After the war he returned to Cambridge as a Fellow of Trinity College, for three years of study for a PhD in mathematics. On completing his degree in 1948, he joined the Faculty of the University of Toronto, where he rose to pre-eminence in combinatorics. In 1962 he moved to the University of Waterloo, where he had a significant role in the development of the university and its Faculty of Mathematics.