I have Hannah E Dark as a direct ancester. Her parents I believe were William and Elizabeth Cooper. I have Hannah married William Brown and having three children Elizabeth, Georgina and Thomas. Hannah later married Robert Coleston. They had a daughter Ada Coleston. She is my ggrandmother. There is no birth record for Ada in the NSW BDM but one of here daughters is still alive (just) and has confirmed this. I've only just received this information and have only got as far as William Dark and Elizabeth Cooper. Do you have anything else??
Thanks Anissa Jones Blaxland NSW
PS I know your message was a couple of years old but I thought I'd give it a go