While Alan Richards provides the 1955 death date, he also indicates that she was buried 10 Sep 1886. This is probably a typographical error, since she appears in the 1901 census.
ON DURHAM (West/Ouest) (#56) Subdistrict: Clarke C-9
27 7 Squair Jane F Head S Feb 12 1853 48 O r Scotch Canadian PresbyFarmer 28 7 Squair Cate? F Sister S Aug 5 1855 45 O r Scotch CanadianPresby 29 7 Squair Mary F Niece S Aug 4 1885 15 O r Scotch Canadian Presby
Name:Mary Squair Date of Birth:4 Aug 1885 Gender:Female Birth County:Durham Father's Name:Francis Squair Mother's Name:Clara Matilda Prout Roll Number:MS929_72
Name: Mary Squair Gender: Female Marital Status: Single Age: 5 Birth Year: abt 1886 Birthplace: Ontario Relation to Head of House: Daughter Religion: Free Church French Canadian: No Father's Birth Place: Canada Mother's Name: Annie Squair Mother's Birth Place: Scotland Province: Ontario District Number: 59 District: Durham West Subdistrict: Clarke Neighbors: View others on page Household Members: Name Age Francis Squair 71 Ann Squair 68 Jane Squair 38 Katie Squair 35 Annie Squair 33 Mary Squair 5