Just making a note because the name was mentioned earlier - it may or may not be of use at some stage ?? There is also an ancestry tree for this one for you to refer to if necessary.
Found an obituary 15 February 1958 - it refers to a Annie Mabel Smith (Mabel Stringer wife of Alfred Stringer) but on her birth the name was Mabel Smith born 31 January 1894
The Toronto Star
Toronto, Ontario, Canada
Sat, 15 Feb 1958
Page 38
https://www.newspapers.com/article/the-toronto-star/144934635/Mabel Smith - Birth Date 31 Jan 1894 South Bruce, Bruce County, Ontario, Canada
Father Charles Samuel Smith (born in Ontario) - Mother Susan Hilson (also born Ontario)
No Scottish connection.
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Tried a later birth year ... another to discount......
Malcolm Herbert Smith - Birth Date 26 Jul 1909 York, Ontario, Canada
Father George Herbert Smith Mother Grace Burns
https://www.familysearch.org/ark:/61903/1:1:QV9H-F17VSeems to go by the middle name Herbert (Malcolm) Smith on his marriage 7 June 1934 - occupation was civil engineer
The obit and find a grave - 1994 - went under H Malcolm Smith. No mention of a Mabel A Smith
https://www.findagrave.com/memorial/104453353/h-malcolm-smithThe Toronto Star
Toronto, Ontario, Canada
Tue, 9 Aug 1994
Page 53
https://www.newspapers.com/article/the-toronto-star/144937616/