I search the IFHF's online database at ROOTSIRELAND.IE. It has abt 19 million B/M/D and other records for MOST of Ireland.
For Bridget Watters B 1878 +/- 7 yrs, Co. Louth, with a father forenamed John, I found 1 record in 1885. Dundalk is in Co. Louth. This MAY be for your ancestor. A view of the detailed record MAY let you accept/reject it as for your ancestor.