This is my first reply that I've just finished writing: Hi xiaolu, There is an actual source for Martha Augusta being one of George's children, it's just that my cousin didn't list her in the first hand-written family tree she did but did so in the following one. The research I'm putting on here was done by my distant cousin who used the Internet and obtained hard copy certificates as well as travelled around the country to do more search i.e church, cemetery records etc. My mum did a lot of research prior to the Internet, obtained hard copy certificates, and details from overseas and this is matching up with what my cousin has discovered.
It's well noted that our George was in Australia in 1850 because of his marriage certificate.
Reply to your latest post: I haven't been following any 'how to research', just doing my own thing and using what I already have. I have my grandfather, Walter's, birth certificate and it has recorded his parents - George and Ellen, and that George was a publican and their residence as Mt Gambier, but not their birth details.