In regards to JamesNelson....
.I am in the midst of contacting the Archives..we sent an email, but have not heard as yet..
I also got in touch with the photo crowd you mentioned, and am waiting a reply from them.
On their marriage certificate, it stated that the fathers occupations were,(James) Publican..where? and John Donovan (Hannah's father) painter..where? I wonder if that was in England or Australia, as there were no signatures, just written by the same hand, which makes me wonder if they were present at the wedding... and.no ages of couples...
Have you any suggestions?
Until I get a day, and month of birth, its hard to go any further without this, and so many Nelson born in the same year...Also, there is a thought that he may have put his age up to get into the Army/Navy/Marines...

I am going to get in touch with the People connected to the Convict records in Perth , and see if they have anything.. what do you think?