Regarding Cornelius McCarthy .. what were his parents names?
This is probably a long shot but I have a CORNELIUS McCARTHY whose family was from Cork in the early 1800s (and his parents were PATRICK McCARTHY and MARY nee CUTTER?).
By 1843, Cornelius was in the 15th Regt but that is the only details I have on him.
His siblings were named ELLEN, HONORA, CHARLES, JAMES & PATRICK.
Cheers from Down Under :)