Name from birth search for son on New Zealand BDM website in May 2021:
1884/2173. Smith, Walter George Thomas. Mother: Ellen. Father: William John

Year and country of marriage from search on New Zealand BDM website in May 2021:
1877/1676. Bride: Ellen Waterson. Groom: William John Smith

Full date of marriage of 13 September 1877 from further searching in May 2021 on BDM Search by incrementally changing the date range for the marriage.

Year and country of death, estimated year of birth, from death search on New Zealand BDM website in May 2021:
1916/447. Smith, William John, died age 66Y [Therefore born circa 1850]

Full date of death of 24 March 1916 from further searching in May 2021 on BDM Search by incrementally changing the date range for the death.