Goodspeeds 1889 History of the County of Middlesex, Canada reprint shows p. 57 the second marriage of 14 Dec 1837 of Sarah Jane's mother the text reads
John Elson to Mary Bioito, of London.
The photo album of the late Charlotte Box has Mary Boits - wife of John Elson died April 10, 1887. Age 78 years (England) Mother of Sarah Jane Elson who was the wife of Henry Prince Buried in Hyde Park Ont next to photo of sister
Elizabeth White - wife of Joseph Prince who was born in England died in Musoka District, Ont. about 1894, Sept 20th parents of Henry Prince both parents buried in Hyde Park, Ontario.
Censuses: I've found Sarah Jane in the 1852, 1861, 1871, and 1881 censuses. Were there any censuses before that in Ontario/Canada West?
Birth record: Impossible to really search for until her parents' names are known.
Marriage record: I've searched online and haven't been able to find the record of her marriage to Henry Prince. I've posted questions about this on several forums, but so far no one has attempted a look up.
Death record: I have found Sarah Jane's death record (see Sources section).
I do not have experience with less common sources, so I have not yet researched any other types of records. I have done general searches on FamilySearch and come up empty.
1881 Census, in London, Ontario; age 42; husband Henry, age 45; children: John Henry, age 19; Jane, age 18; Harriet, age 16; Ida, age 13; James Edward, age 11; William, age 9; Alice, age 5; Isabella, age 3. Mary Elson, age 75 (widow). James Prince, age 33
1871 Canadian census, London, Ontario; age 30; husband Henry, age 36; children: Elizabeth, age 11; John, age 9; Jane, age 7; Harriet, age 6; Ida, age 4; James, age 2.
1881 Canadian census, London, Ontario; age 42; husband Henry, age 45; children: John Henry, age 19; Jane, age 18; Harriet, age 16; Ida, age 13; James Edward, age 11; William, age 9; Alice, age 5; Isabella, age 3. Mary Elson, age 75 (widow). James Prince, age 33.
It may be possible to confirm family relationships with Sarah by comparing test results with other
carriers of her mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line: