Hi Marlsie
Yes you do have the correct McGraths.
I don't know of William McGrath, but Henry and James McGrath of Cambewarra are brothers. They had 2 sisters - Susan and Ann. Henry and I think Susan went on to live at Green Hills estate in Nowra. That estate was owned by Alexander Berry.
Yes James McGrath was born in 1808 and died in 1885 and was sent here for manslaugher - throwning a stone that killed a policeman. My auntie hired a researcher in Ireland to pu together some facts on the McGrath family in Dromore. I have recently posted that story on my ancestry page, which you can have a look at. It gives an insight into the origins of the family and the times that James grew up in.
I have had contact with 2 other people who are researching the McGraths from dromore. One is Christine Kennedy - is this your cousin? I know Christine has produced a DVD, not sure about a book. Another is a lady who is related to Edward McGrath, who we think may be James' brother.
Christine has a lot of imformation about the McGraths in Braidwood. James McGrath married Mary McGrath from Braidwood. the Braidwood McGraths are related to the Cambewarra McGraths. Christine talks about an Uncle in Cambewarra who was a convict.
I would love to meet up and chat family history more, if you live close enough.
I live at Albion Park Rail NSW, where do you live?
The other lady I have been in contact with lives in Nowra.
Regards
Beth Tierney (nee McGrath)