This baptismal record is of Catherine Jane Bryanton, illegitimate daughter of Mary Jane Bryanton and no father listed... Baptised at St. Mark's Anglican Church, Kensington. "Prince Edward Island Baptism Card Index, 1721-1885," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KCXZ-L5G : accessed 28 December 2014), Mary Jane Bryanton in entry for Catherine Jane Bryanton, 23 May 1861; citing p. 72, volume 2, , Prince Edward Island, Public Archives, Charlottetown; FHL microfilm 1,487,751.
"Canada Census, 1881," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MVN7-V5P : accessed 16 Nov 2014), Cathrine Caseley in household of John Caseley, Lot 18, Prince, Prince Edward Island, Canada; citing p. 47; Library and Archives Canada film number C-13162, Library and Archives Canada, Ottawa, Ontario; FHL microfilm 1375798.
It may be possible to confirm family relationships with Catherine 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 Catherine: