I have no idea when I got this but the website source is no longer functioning (http://people.becon.org/~nbogs/note9305.html - once the site for the Niagara Peninsula Branch - Ontario Genealogical Society)
Take it for what it's worth, it says that Elsie was the daughter of a Cornelius Johnson and Lydia Cole.
"JOHNSON: Cornelius b 1793 USA where? Settled in Louth Twp. When did Cornelius die? Seek names of Parents, siblings, date married to Lydia COLE b 1795 Louth Twp. dau. of William COLE and Elsabeth SCHRAM. When did Lydia die and where? Ch: Elsie (PURDY), Jane (JOYCE), Lydia (TUFFORD), Margaret (DEAN). second:FREASE: Anna b 1812 d 1885 Caistor Twp., married 1831 to John NELSON of Grimsby. Seek names of her parents & siblings. Ch: May (HILL), Isaac (FREEL), John H. (1. HARRIS 2. WIGLE) and Absolum (TUFFORD). Contact Mrs. Hope Herndon, 415 El Greco Dr., Brandon, FL, USA, 33511-7417"