According to the Ontario Cemetery Finding Aid there is both a Frederick and a Kate L. Harris buried at Erin Union Cemetery, in Erin Twp., Wellington Co., Unfortunately, the OCFA does not provide dates, and no source of photos I can find for that cemetery has that particular surname. (CanadaGenWeb Cemetery Project, Find a grave, and CanadianHeadstones.com)
If it helps there are two other people listed with the surname Harris in that cemetery, a "W.J. Richard" and a "Gertrude".
Ontario Cemetery Finding Aid Link: http://ocfa.islandnet.com/