Marian Elizabeth BROWN married John Conrad TURNER. They are/were my Grandparents. According to stories Nana (Marian) told me as a child she had a brother who may have ended up in France after WW1. From what I can remember Nana believed he had married a french girl. Marian Elizabeth Brown lived to be 96 years of age and passed away in 1980 I think. Her birth certificate says that she was born in Trinity Newington, county of Surrey, born on 25/2/1884 at 62 Swan Street. Her father's name was John James Brown and mother's name Marian Brown, formerly Lovell.
The picture you have, I believe, would show John seated, Marian standing behind him, one child standing, the other I recall being on John's knee. The 2 girls were Thirza and Beatrice.
John Conrad Turner died in 1928 from tuberculosis and related illnesses - a sad story. Thirza and Beattie travelled to Waterfall (south coast NSW) where John had been "quarantined" to identify the body. Nana, I believe, was too distraught to have attended.
John and Marian had 12 acres near Fairfield (NSW) but during the depression years all of the land was gradually sold off as Nana struggled to raise 7 children during the depression.
The discussion that I chanced to discover on the net correctly identifies Thirza, Beatrice, Ethel, Louisa, Ivy (Stella). Other children included my mother Edith, born 1919 and after her, Elsie and Jack. Elsie and Jack are the only 2 surviving children of John and Marian.
I hope this information is useful to you; I would love to have further discussions with you about Nana. I would be keen to find out more about Nana's brother.
Rob Currie