Born in London, UK, on November 18, 1934, Denis died on January 22, 2016. He obtained, in 1957, a BSc from University College, London, and did his MSc and PhD degrees at UBC. He held a post‑graduate fellowship at the University of California, Berkeley, from 1962‑64. After teaching at UBC he joined the faculty of McGill University in 1965, serving as associate dean of Graduate Studies from 1971‑75 and becoming emeritus professor of chemistry. He is survived by his wife, Patricia Goodwin, BA’57, sons Michael Goodwin Gilson (Christine Lanthier) and Stephen Thomas Gilson (Karen Laduke), granddaughters Clara Lanthier‑Gilson and Kathryn Meagan Gilson, and brothers Ian Trevor, Noel John and their families.