I too have been interested in the 1798 Wexford deaths especially one of John Hatchell. i was lucky to find the document for a claim to recompense that his orphan children made after his death. findmypast has a list called 1798 Claimants and Surrenders. I dont have a sub now. but someone may be able to help. If Gainfort is on it, there may be a claim document for his next of kin.
These papers for my John Hatchell outlined a little of his personal information and of his children's situation. That was really valuable information to get.
If a claim was made fro Gainfort, it may be in the Rebellion Papers which were held in the State Paper Office which is now closed. The papers were transferred to the NAI but not all of them have been indexed. In fact it seems only the most prominent people's records are listed in the index of the Rebellion Papers on the NAI site. I was lucky to have found a journal article with a precise index number for my Hatchell, and I paid an Irish Family History Centre person to look it up for me. It was simple with the number known.
If your Thomas Gainfort's widow or children made such a claim it may be in those Rebellion Papers but how to get it out might be a problem. I could send you my index number - it might be the same box or not.
Your Thomas Gaifnort may be the man married to Margaret Hatchell. Perhaps she was John Hatchell's sister.
It may help you to know that such a resource is possibly hidden away in the NAI.
