Perhaps the following is a sidetrack. perhaps not... but I will post it on the off-chance
Hi there,
There’s a photo apparently of Ernest FIRTH, son of Patrick and Catherine FIRTH that has been uploaded to a public tree at Ancestry. He is in his WWI uniform. I am confident that the person in that photo is of Aboriginal descent however the family tree owner for Ernest does NOT show where the photo comes from, or how they can prove it is a photo of Pte Ernest James FIRTH, No 1696, 1st light horse regiment. This could be important, because they show Ernest’s father’s father as born in Ireland.
From the National Archives of Australia I can see the digitised service records for Pte Ernest FIRTH. He is among the many Australians who fell in action. The Commonwealth War Graves Commission website has details also.
National Archives of Australia …. Search as a guest using the “RecordSearch” option. There’s 48 pages. Complexion : Dark; Eyes : Dark; Hair: Dark;
http://www.naa.gov.au/collection/search/index.aspx One of his other brothers was in the New Zealand Expeditionary Forces.
Commonwealth Ware Graves website
http://www.cwgc.org/find-war-dead/casualty/644545/FIRTH,%20ERNEST%20JAMES Australian War Memorial Website
http://www.awm.gov.au/ Mapping our Anzacs
http://mappingouranzacs.naa.gov.au/ Ancestry’s submitted tree has Patrick James FIRTH as born 1842 at Molong NSW, son of James Patrick FIRTH born 1808 and Catherine BLACK (no further details for her). James Patrick, apparently born County Ireland convicted Tipperary 16 March 1832, Arriving Sydney 1832. So I can confirm that NSWSRO has a James FIRTH arriving on the Eliza in 1832, and his Tick of Leave in 1837 was for the Bathurst District of NSW. BUT as to how to connect this chap to Patrick James FIRTH, born at Molong in 1842 … well I am still pondering on that, and how to join up any of these dots…… I am particularly concerned as to how to confirm that that photo on Ancestry is actually of Ernest, the son of Patrick and Catherine FIRTH mentioned in earlier posts. And then to try to find the family connection to Agnes or to Mary FIRTH.
ADD This Ancestry tree does have that Ernest as one of the many children of Patrick and Catherine FIRTH

it is just that they have not uploaded supporting documents (and I well understand why they don't do that, afterall, so many people will copy their documents and try to use them for their own family trees without doing the basic research for themselves).
Cheers, JM ….