From:
http://www.mytrees.com/newanc/New-Zealand/Died-194...d-by000259-6858.html

Date of death, place of burial, estimated year of birth [circa 1861], from Te Henui Cemetery headstone records found in June 2020:
Row 5 6692
In loving memory of WALTER JOHN beloved husband of Elizabeth J. WILKIE died 30th July 1939 aged 78 years. Also ELIZABETH JANE beloved wife of the above died 5th April 1942 aged 78 years. At rest.

Date of burial, different age at death, from New Plymouth District Council cemetery records found in June 2020:
Last Address: Woolcombe Terrace, New Plymouth (Farmer-Retired)
Age at Death: 88 Years
Date of Death: 30 Jul 1939
Category: Burial
Funeral Director: Boon, No Longer Operating
Date of Burial: 31 Jul 1939
Cemetery: TE HENUI
Location in Cemetery: Hendrie Street Extension Row 3 Lot 6 Plot 3

Year and country of marriage, misspelling of Walter’s surname, from search on New Zealand BDM website in June 2020:
1884/978. Bride: Jane Elizabeth Hollard. Groom: Walter John Wilbie

Full date of marriage of 23 May 1884 from further searching in June 2020 on BDM Search by incrementally changing the date range for the marriage.

Year and country of birth from search on New Zealand BDM website in June 2020:
1861/8502. Wilkie, Walter John. Mother: Elizabeth. Father: John

Full date of birth of 5 February 1861 from further searching in June 2020 on BDM Search by incrementally changing the date range for the birth.