I searched the Irish Family History Foundation's database. It contains 12,000,000 surviving rcds for abt 65% of Irish counties. Rcds B4 1840 are sparse.
For Thomas Martin M 1895 +/- 2 yrs, I found 1 M rcd in 1893. However, I couldn't find a matching marriage rcd for Maria McGuinness in this yr. B/M/D registration was civil after 1863. These rcds are kept by the General Register Office. Contact its website at http://www.groireland.iehttp://www.groireland.ie to request copies of their marriage rcds.
Google the Foundation's name to lead you to this database. Register, opt to be notified as rcds are added and browse. Pls post your search results to my genforum msg.