Hi Sheila;
I too am researching the Casey surname. According the 1861 census, they had 11 children. I have found the names of 5 of their children.
Jeremiah, William, Michael, Katherine and Ellen.
Patrick and Katherine are my great, great grandparents.
I have abit of info on the children. Would love to hear from you to compare notes.
Regards
Andrea
acaplynch@gmail.com