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1860-70 Born in Toronto
Before the first World War, he worked in Toronto as an electrician before moving on to internal combustion engines, including his version of the single-sleeve motor.
Possibly professor at Toronto University (needs confirmation)
After WW1, it appears he may have moved to the U.S. to work with his brother or son, Henry John de Neville McCollum.
He was married (wife's name possibly Florence) and had at least one male grandson.