There seemed to be 2 Effie Byers born in Ontario. Effie May d/o George and Eliza (Annie in census) died 29 Oct 1907 at London, Middlesex.
Effie, d/o Robert and Sarah is on the 1891 census in Darlington, Durham, Ontario and by the 1901 census the family had moved west to Carievale, Saskatchewan. Siblings to Effie on the 1901 census are Edgar, Pearl, Lillian, Nellie.
Have you looked at the Resource board to find the links to the sites for the census that you can search for free from Library and Archives Canada and also automatedgenealogy.
What else are you looking for?