Hello Tania,
You have put a very big smile on Bill's face. I've sent your information to him via post. I will do a follow up via the link you provided. I think Bill would love to know where his mother is buried. He remembers that Ron (Milton) was a returned serviceman. Iris and he met in Melb and moved to Qld with the three younger children. Bill recalls only meeting his mother once thereafter. With a bit of luck, I may meet up with Bill next week. He has told me that he would love to buy you a box of chocolates, as a way of saying thank you. He is so appreciative of the information you have found. I would still be typing name combinations into the BDM search engine. I might pick your brain for leads, if I get stuck - hope that is okay.
Kind Regards from Raylene and Bill