I believe your Thomas Smith was born 4 Oct 1808 - Midlothian Scotland;
died 1 Jan 1864 Worrell (sic) Creek NSW Aust (drowning)
Married Mary Harriet Birdsill 25 Nov 1842 Port MacQuarie NSW. ( both convicts)
Both Mary b 1817 d 1894 and Thomas had previous spouses.
Children attributed to Thomas and Mary number 11.
They lived and worked around Austral Eden New South Wales Australia near kempsey nsw on the Macleay River.