Year of birth is a guesstimate There is a will dated 27 May 1802 and proved on 19 June 1803 of an Arthur Thomas, probate granted to Francis Thomas. The NA ref is Char 1/1/50 and there is an extract. Could be this Arthur Thomas. The extract says that he left £100 to the wardens of St Peter's Dublin and £100 to the minister and wardens of St Nicholas without. Interest to be used for firewood and meat on 24 Dec annually. There are a number of children an Arthur and Catherine Thomas baptised in the right time period at St Peter's Dublin. And there is burial of Arthur Thomas of York Sreet on 4 May 1803 at St Peter's Dublin

source: Burke: Landed Gentry 1912 based on Betham Sketch Pedigrees Vol VIII Page 53, where it is noted that she was the only child. Year of birth is a guesstimate Was married and with her husband made a Deed in 1766 (Memorial no 461413) And in Memorial 165725 Arthur Thomas and Catherine Richards with Goddard Richards sold Clonmore and Cooladine and other lands that had belonged to her father Edward There is a burial of a Catherine Thomas on 14 Feb 1777 at St Peter's - of Longford Street.