How interesting to receive your note. You can reach me at "email@example.com
My grandmother's name was Mary O'Leary, on my father's maternal side; my great grandmother was Mary Leary, on his paternal side, so it gets very confusing.
My grandmother had 7 brothers and 7 sisters, one was named Daniel. I have a note that says he came to the USA but then retired in Ireland. He married a Cronin and was probably born between 1864 and 1979. There is no date by his name in my mother's account. I have a lot of information, but let's see if we can narrow it down. If your kin came from Rathmore, it sounds very promising. Do you have any names of other siblings?
I have a lot about my grandmother and only census records on my great grandmother. I was looking for more McCarthys on my grandfather's side - Dennis McCarthy of Lawrence/Haverhill, but stopped a few years ago.