Thanks everyone for the feedback.
I have searched on Trove, Ancestry, IGI, Google, National Archives, pretty much anywhere I could think of.
Yonks is Perth Battye Library similar to Trove? I wasn’t meaning that there wouldn’t / couldn’t be a reference found of Florence in the WA source. So Battye library has copies of newspapers from all over Australia as well. I will keep that in mind. Are they online or do you have to go to the library?
Treetotal – her name is Florence Davey. She was probably born about 1918. That is a best guess. I have searched using her name, nick name, and variations. However, it is believed that the title or text with the photo ( I don’t have the text) was something like 'Visitors enjoy the outing'. I have searched for variations of this text – no luck. I don’t know if she is alive. I don’t know if she married. Details about her are very sketchy. Since her siblings were born in Queensland, I believe she was also born in Queensland.
Florence is one of life’s mysteries. I will put her on the backburner for now.
Cheers