Hi Robyn,
All I know about Bridget prior to coming to Australia is that she was born in Monasterevin (written as Munstrevin on her death certificate) in Kildare, Ireland sometime between 1814 and about 1825. Her parents were Mary and Thomas but both were deceased when she came to Australia. I have no idea about any siblings...sorry.
Craig, I am unable to help either as my Flood relative is from the Hunter/New England region.
Cheers,
Bec