Welcome to Ireland Reaching Out! I am the Parish Liaison for Tulla with some Cusack connections of my own.
I can tell you a little bit more about your family from the parish registers.
Pat Cusack was baptised on 24 December 1830 to John Cusack and Margaret Butler of Moymore. His sponsors were: John Lillis and Margaret Flanagan.
Bridget Cusack was baptised on 4 November 1834 to the same parents. Her sponsor was Bridget McMahon.
The Cusacks were also located in the Tyreera/Ballyblood area of Tulla and may have been connected to the Coffey/Coffee family who resided there.
There are others who are researching this same family and if you are interested in making contact with them, please let me know.
You can email me directly at: email@example.com.
It would be great if you could create an Ancestor Profile for Thomas Cusack. You can do so through the XO Chronicles Tab at the top of the page.
As to your query about the Historic Graves marker, it is possible that this could be an ancestor. There are several Cusack headstones in the old section of the Tulla graveyard.
I look forward to hearing.