In 1890 they had a daugher Annabell Beatrice. 
In 1894 they had their last child a daughter Ada.
A Charles Wright passed away in Nov 1887 at the age of 7 years. He is buried with William and Arabella in Plot 112 - Charles Wright, 7 yrs, Nov 1887, Angl cem. plot 26, sec 4. of Tauranga Anglican Cemetery but the birth record and death record don't match....the birth record in 1875 would mean he was 12 years old not 7 yrs as is recorded in the Death Record.
William passed away in 1922 in Wanganui, New Zealand. His remains were transported to Tauranga and he was buried in the Anglican Cemetery in Tauranga, Tauranga City, Bay of Plenty, New Zealand. Angl Cem. Sec 3. Row 6, Plot 58,
↑|"Births, Deaths & Marriages Online", (digital index), New Zealand Department of Internal Affairs . ; (accessed 14 Feb 2020), Marriage record; Reg No:-1870/5583 Bride: Anna Bella Lind ; Groom: Oliver William Wright.
Find A Grave, database and images (https://www.findagrave.com : accessed 14 February 2020), memorial page for William Oliver Wright (1842–1922), Find A Grave Memorial no. 195494780, citing Anglican Cemetery, Tauranga, Tauranga City, Bay of Plenty, New Zealand ; Maintained by Clancy (contributor 48290237) .