Dead end with Irish ancestor

Question

Have been trying to make a connection to my Great x3 Grandfather Martin Murphy 1827-1899.  He was married to Catherine McPherson in the US but  he was also married in Ireland.  The story goes that he got drunk in a Dublin pub and knocked out then shipped to the US as slave labor.

Answer 1

So many Martin Murphy's in Ireland. What year did he leave Ireland? When did he marry Catherine McPherson?

Answer 2

Without exact date of birth,and knowing County he was born in

Irish Govt, destroyed all paper records all that survived were

catholic church records.