1891 census Kent Dundas New Brunswick SMITH Bowen, 55, married Walter, 17, Harison, 14,
All born NB.Walter and Harison are on 1881 census in same place. No sign of Harriet.
1901 census Unorganized Territories, The Territories in Yukon Territory. SMITH Bowen, 66, b NB, trader Harriet, 55, b PEI Walter, 25, NB Harrison, 23, NB Hattie B, 20, NB
1911 census Yukon Territory SMITH Harrison, divorced, aged 33, born Oct, NB, is lodger with lodger with Walter and Hattie Handcock. Hattie is 30 so is likely his sister.
1901 and 1911 census on www.automatedgenealogy.com
I don't see any of them on 1921 census.If Walter and Harriet moved back to Nfld they won't be on Canadian census so you will have to look in a Nfld site.
Marriage Kent NB from Druoin Collection Walter H Handcock, 25, living Montreal, born St John's Nfld,telephone operator, s/o Emile and Sarah, married Harriet B Smith, 26, living Shediac, born Notre Dame Kent County, d/o Bowen and Harriet. The date of marriage is cut off. Sometime between 1888-1921.