Searching for information about Roderic O'Connor of Connorville

I am writing a biography of Roderic O'Connor, who emigrated to Tasmania in 1824 and became famous (and rich) in politics and as a landowner. I will be in Cork from 9-16 June and would like to gain information about where Connorville was (near Manch) and anything else about the O'Connors. From Alison Alexander