Al,as a hobby I work on a data base of the Red River Settlers and families and I was wondering if
Mary Elizabeth could have been a child of William Sinclair Stevenson- have most of his children in my database and her birth date would be his maybe last child. I do not see Mary listed in any documents that I have.
I see George and Mary on the various census reports saying that George was born in Manitoba as well as Mary- her birth date matches the date that you mention.
If by chance Mary is the daughter of William Stevenson I have been able to piece together the family and do have some headstone markers.