Her date of birth on the 1901 census is Apr 9 1845, the cemetery records show it as 1843.  The census indicates Mary came from Scotland in 1846.

Death registration #003423, Mary Sinclair, female, born Canada, Married.  She was 79 years of age at her death and a houswife.  She had been at her present home for 50 years and had lived all 79 years in Ontario.  Her father was Ronald McClerian.  The informant on the death certificate is Bell Mark Sinclair of RR #2 Hisslburgh, her son.