Henry Dearborn’s interests were diverse, but his interest in mathematics was a constant.   Henry  grew up in Peterborough, then attended both McMaster University and the University of Toronto.
During W.W. II, Henry did meteorological forecasting for the RCAF in several Canadian locations.
Weather forecasting gave way, though, to a mathematics teaching career.  Henry taught at Runnymede C.I. in Toronto and Burnamthorpe C.I. in Etobicoke, where he was department head.   He chaired both the Grade 13 Trigonometry and Algebra departmental examination committees, and he spent many years working with the Canadian Mathematics Competition, mainly on the Descartes problems committee.
Henry had a number of interesting pastimes.  He was a keen lawn bowler and competed internationally.  He enjoyed collecting stamps and loved fishing, especially at his cottage between Mindon and Haliburton.