According to the 1901 census of Canada, Mary Ann was born on 3 Sep 1848 in Ontario and was of Irish origin (Ref: Census Place: Cardiff, Peterborough (east/est), Ontario; Page: 9; Family No: 87).
Nicholas and Clara are on the 1871 census of Canada (Ref: Census Place: Georgina, York North, Ontario; Roll: C-9966; Page: 19; Family No: 67): Nicholas, age 63, born England, English origin; Religion Society of Friends (Quaker); Clara, age 52, born Ontario, Scottish origin; Religion Weslyan Methodist. Children: Wellington age 19; Obadiah age 16; Phoebe age 14; Cloe age 12.