I did not find my grandfather's (Joseph Marnell) death registration yet, but I did find him in the 1901 Census of Ireland. (I already placed him in the 1911 Census of Ireland with his wife and son.)
1901 Ireland Census -
It's a Military Barracks - Yeomanry Barracks)
Resident's of house 1012 Curragh, Part of (Ballysax East, Kildare)
Marnell, Joseph, age 26, Roman Catholic, Birthplace: Antrim, Clerk, not married. On page 10 of Barrack's Return.
It was interesting, since I did not see this before.