Clonmel RC St. Mary's has records from 1790-1880 and also SS Peter & Paul, Clonmell 1836-1880, CofI marriages 1845-1864. This from an Irish History Foundation website with parish records.
Francis George was not a common name so you should be able to find a marriage, this would include the bride's maiden name and her father's name. A birth record would have parish/place, date, mother and father's name and mother
Ancestry seem to have the biggest ship passenger lists but you can also try wwww.theshipslist.com
There used to be several organizations like ancestry who had passenger records but I think Ancestry has pretty much wrapped up these small enterprises.
About the only record Ireland has for passenger records are convicts list is available at www.nationalarchive.ie
Does not the Auz. government have a website for that?www.familysearch.org
has only one James Collins on the Bounty Feb 1842.www.askaboutireland.ie
for the 1852 Griffith Valuation.
Couldn't see a Francis.