Hi All!
I need help

My Grandfather is almost unknown but i know somewhere some how some-one knows something! So i turn to rootschat!
Below is all of the information we have on him:
Name: Joseph Smith
DOB: 1815
DOD: 1892
Married: Mary Sneyda in 1853 at sutton forest NSW,
She was a free immigrant from dublin
We do not know where he came to Australia from but most likely England?
On his marriage certificate it says
Bachelor I.OL
We dont know who his parents are but they had a bus load of children:
John Thomas Smith 1858
Elizabeth Smith 1867
Henry C Smith 1865
Maria Smith 1860
Joseph Smith 1856
Jane Smith 1863
And 2 other possibilities
All Children were Born in Berrima, NSW Australia.
If there is anymore information i can get regarding this it would be amazing. Im just at my wits end on where else to find Joseph Smiths parents DOB etc
All help will be sooo muchly appreciated