"Ontario Marriages, 1869-1927," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FMK7-P6X : 10 April 2015), Percy A Agar and Emily Brown, 20 Dec 1893; citing registration , Collingwood, Grey, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,870,704.
"Canada Census, 1901," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KH25-JN1 : 13 November 2014), Emily Agar in household of Percy A. Agar, A, Grey (east/est), Ontario, Canada; citing p. 2, Library and Archives of Canada, Ottawa.
It may be possible to confirm family relationships with Emily by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Emily: