Carroll Ancestory

I'm from Australia and chasing up on some ancestory information. 

I understand that a Robert Carroll and Jane Dale married and headed off to Australia, with Robert passing away in 1885 and Jane in 1901 in Ballarat, Victoria, Australia. They had from what I can gather, three children, William, Ann and James being my Great Grand father.

I have little information from the Irish side and pretty much the same from an Australian perspective and wondering if anyone there has useful information I may build upon. 

In conjunction with this, I am planning to be in Ireland late April, early May, 2014 and was wanting to visit the old family area, whatever that may hold.

Thank you for your help,

Regards, Chris Carroll