Elizabeth's birth was registered in New South Wales in 1870. Her parents' names were recorded as George Davis and Catherine (no maiden name mentioned).
Strangely, the birth of George and Catherine's son John was also apparently registered in New South Wales in 1869, (reg no. 1084/1869 1084 VOL 159) although he had already been registered in South Australia the same year (69/574). It suggests this was the year that George and Catherine moved to NSW, soon after John was born. Or perhaps Catherine followed George after the birth.
On 21 March 1891, Elizabeth Davies (sic) married John Douglas at Port Adelaide in South Australia. Her father's name was listed as George Davies. I haven't been able to find out much about John Douglas, but it would seem from the Victorian electoral rolls (on ancestry.com) that he was a mariner. He is probably the John Douglas who died in South Melbourne in 1933. (Elizabeth Douglas appears alone on the electoral rolls after this date.) He was the son of John Douglas, but that is all the information available on the marriage and death records.
When 82 year old Elizabeth Douglas died in Port Melbourne (Victoria) in 1952, her parents' names were listed as George Davis and Katherine Mason. Her place of birth was Sydney, New South Wales.
She seems to have been quite a well known figure in her own sphere. This obituary appeared in the Record, Emerald Hill, on 8 August 1952:
Mrs. E. Douglas Dead At 82The mention of Elizabeth's association with the Salvation Army is intriguing, given that her cousin Eliza Whybrew (Susan Mason's daughter) was also a member of the Salvation Army in England all her adult life. I wonder if they ever communicated with each other, or even knew of each other's existence?
Mrs. Elizabeth Douglas, of Raglan Street, South Melbourne, who died last week, aged 82 years, was mother of a family of nine — seven sons and two daughters— one of whom is Mrs. W. L. Smith, Mayoress of Port Melbourne during 1950-51.
Mrs. Douglas lived in South Melbourne, for over 60 years during which she won the love and esteem of a wide circle of friends. She was devoted to the Salvation Army in this district, which she joined in 1896, maintaining an active interest until failing health interfered in recent years.
One of her .sons, John, played football and was connected with the once-famous 'Leopolds' for many years. Max Glass, a grandson, was also well-known as a rover with the South League team.
The funeral left her daughter's home, 93 Pickles Street, Port Melbourne, on Friday last, for Coburg Cemetery, and was largely attended.