The 1851 Census of Canada lists Anna as Hannah and has her mother (and this is an assumption) living with her.
Anna Jefferys, Widow, b. Ireland, Episcopalian, age 65 ...so born around 1786.
Here is the census info so you can find the copy
Year: 1851; Census Place: Grenville, Deux Montagnes County, Canada East (Quebec); Schedule: A; Roll: C_1147; Page: 69; Line: 16
The census also includes sons Henry & Robert as well as George N Albright.