Sarco,
They were married in the Wesleyan Church, Gunnedah 16 Oct 1888 so it doesn't look promising. The place of birth is blank for bride and groom. Age and father's name are shown only for the bride.
I have been in touch with the owner of the tree on Ancestry, with limited success so far. There are many errors in the tree so I didn't pursue it very far. The same death date occurs in a couple of other trees, but I can find no source information.
My late father used to talk about his extended family and was interested in family history but never mentioned Thomas, who was his grandmother's brother. In fact, when I started serious family history I was unaware of his existence until I found the 1871 census.
The death of his mother when he was 7 and of his step-mother three years later, followed by his father's 3rd marriage when he was 15, could have resulted in an estranged teenager who 'ran away to sea'
One of the most convincing links is that the later Thomas always uses the same birthday on official records as the true birth date of my relative, although the year varies.
Mike.