THIS (in my humble opinion) is the story you are looking for. "Fred's" age is a little off and the date of the accident is not May 1919. Do you happen to know if the family lived at 127 Brock in Toronto? Perhaps he survived and lived until May 1919?
From The Daily Mail and Empire - Feb. 18, 1899.
BOTH ARMS WERE MANGLED.
Fred Gunn's Terrible Mishap While Attempting to Get Off a Train.
"Don't Tell Mother Till the Morning," He Said to a Friend.
http://news.google.com/newspapers?id=BIsJAAAAIBAJ&sjid=n...