Hi Jud, I posted a reply to you but it seems to have dissapeared into cyber space !! forgive if it appears and this is a repeat of the info it contained. I went to Barrowhouse for you this afternoon. There is a Catholic church there built in and around 1834, it has a cemetery around it , its classed as the parish of St Michaels so the records for the burials will be held at the church of St Michaels here in Athy Town ( if you needa phone number for them let me know) or at the national Library in Dublin I would assume but you can check that on their website,
http://www.nli.ie/.
The Stones that were readable there date from the time the church was built onwards but of course there may be burials on the records not marked by stones?
To further excite you and complicate the search no doubt ! I discovered there is an old Church ruin and quite a large cemetery attached to it at Tankardstown, I could not access it due to the fact that it is now on Farmland owned by the Kinsella family, it remains public property however so he has to allow access to it but when I called to his farmhouse he was not at home , possibly in the fields as its harvest time and it was a beautiful day today,
I was told by a local that there are still occasionally burials there by local families who own plots, and that there are Crypts there as well as graves and that the burials stated there long before the Church at Barrowhouse.
Tankardstown while fairly close to Athy is actually in Co Laois, and therfore I would imagine the records for it to be in the nearest church in Laois to it which would be the church at Kileen Village where there is also another cemetery of course !!
I would think though that the register for burials there would also be at the National Library but a call to the church here in Athy I would imagine would shed some light on that, I have photos of the Church at Barrowhouse if you would like to have them in case it ties into your search you could pm me an email addy and I will pass them on, hope I have helped a little let me know if I can help in any other way and good luck with your search, regards Damsel