Rily Riley from Dublin Ireland UK

I am searching for birth/death of my gg grandfather who I understand came from Dublin. His name was James and was married to Mary Harford.
They had a son named Nicholas Harford who married Margaret Fleming. She came from Mullinholme, Tipperary.
They then emmigrated to Australia and married in Sydney in 1861.
Can anyone advise me of any of their movements after they arrived in Victoria Australia?
Mary