Name, date and country of birth, year and country of death, from Jenny Smith (nee Bryce) whose late husband, John Monro Menzies, was the grandson of Telitha Carrel (b. 1885), sister of Maud Oliver (nee Carrel).
Jenny believes Stella had one son.

Date of marriage from Janet (Jan) Kelly, great-granddaughter of Mary Ann Carroll, Mary being a daughter of John and Talitha (nee Hutchings) Carroll/Carrel.

Result from birth search on New Zealand BDM website in September 2018:
1905/6989. Richardson, Stella Valmai. Mother: Zephlinda Edith. Father: James Charles

Date of birth of 1 June 1905 confirmed from further searching in September 2018 on BDM Search by incrementally changing the date range for the birth.

Result from marriage search on New Zealand BDM website in September 2018:
1937/11642. Bride: Stella Valmai Richardson. Groom: Edward Ian Duthie

Full date of marriage of 23 December 1937 confirmed from further searching in September 2018 on BDM Search by incrementally changing the date range for the marriage.

Year and country of date of death confirmed, date of birth confirmed, from search on New Zealand BDM website in September 2018:
1991/38586. Duthie, Stella Valmai, date of birth 1 June 1905

Full date of death of 4 April 1991 from further searching in September 2018 on BDM Search by incrementally changing the date range for the death.