Leo, You need to go back to Manusflynn Headford and locate Liam Burke. He is related to Martin Burke, who was executed in Athlone. Liam's father can fill you in on much more details than I can. I know Liam checks in on this thread on occasion for any updates anyone posts and he may try to contact you through the PM, here on Celtic Radio.
Keep me posted if you come up with any new info, either here or on Moore Group Word Press, since I know you posted on there too.