-Forgot to say that on 1916 census, date of immigration for James - 1902
1906 says 1901 1911 Robert says 1900 and James says 1906? ( or a very bad last zero)
Brother Robert isn't included on the FHS tree so am adding some of his info for those searching
Margaret Eunice DICKSON birth Aug 22 1908
Born: PERDUE Sask parents Jeanette GRIEVE & Robert DICKSON
Sister Mary Valance Dickson doesn't show on the records with various details etc. searched.
1911 census has an elderly/widowed Andrew Grieve a few dwellings over who may be her father
1916 Robert's family- with wife's sister & her Children & M.I.L. (Eliz. Grieve m. Thomas GRAY 18/11/1889 Winnipeg Manitoba)
Note Jeanette is now Jessie, and have seen this forename before, also interchangeable with Janet, Jane, Jeanne, depending on a Scottish family's nicknaming variants.
https://www.familysearch.org/ark:/61903/1:1:KM59-TJ8ADDING: By the way several Graveyards here in Manitoba have plenty of gravestones, well into the late 1800s, with Scottish wives under their maiden names.