Hi there,
You note that you have her death cert, so I am a tad confused by your request ... I would expect that Cornelius would have been the informant or at least he would have provided the information on the d.c. about when and where they married each other.
http://www.rootschat.com/forum/index.php/topic,373754.0.html Deaths
Date and place of death;
name and surname;
occupation of the deceased;
sex and age;
cause of death,
duration of illness,
medical attendant by whom certified and when he last saw deceased;
name and surname of parents (if known) including mother's maiden surname signature, description and address of the person who gave the information; signature of deputy registrar, date and where registered,
when and where buried,
undertaker whom certified;
name and religion of Minister, or names of witnesses of burial;
place of birth of the deceased and how long he or she resided in the Australian colonies or states (stating which),
name of spouse,
place of marriage,
age at marriage;
names and ages of children of the deceased.
I am looking for his second marriage to Ruth Ida Abbott in Victoria, She was christened Ida Ruth Phillips although according to her death cert her Christian names have been reversed. She supposedly emigrated to Victoria in 1970 with her first husband Basil John A Abbott.
I found her with Cornelius on the 1980 Electoral Registers living in North Clayton. She died in 1982 and was cremated at Springvale Crematorium. He died in 1993. Both of them left wills.
As I live in England it is getting quite expensive to order records online and wondered if there is any other way to access information.
Poirot
https://www.bdm.vic.gov.au/access-to-registry-information/information-is-restricted-for-specific-periodsJM