Site below should answer your questions about death certificate for Iris. Remember her middlename seems to have been spelt two ways Valinda and Velinda. This may help in finding her. This is what I love about genealogy helping someone solve a family mystery even if it has taken them a life time. Please give Bill my regards and if I can help in any other way please let me know....as I live in Queensland.http://www.justice.qld.gov.au/justice-services/births-deaths...
Also found that Clara WEHSACK died 1929 and her husband William WEHSACK died 1940 (Bill's Grandparents) are buried at Boroondara General Cemetery Grave Location: C/E C 3998 Section: Church of England
Wm WEHSACK married Clara WESTBURY 1898
Wm Robt WEHSACK b: 1904 Richmond Vic
Father: Wm Mother Clara Elizth WESTBURY