Hi Hazen, Welcome to IRO.
Just a bit of info for you for now.
The two men mentioned in the letter……….
seem’s he was a Church Warden
5th townland down Bryan is 3rd from the bottom.
The Thomas Reilly life events.
Drill down to Fig. 4 tells you about the area.
I searched for Polboy seems it is now Poolboy Blackcastle Demesne.