TY Richard Mellish - hope we can get more information. The shooting accident would need to take place before about 1765 (Google books). According to Hugh Shields, Irish poet Pat Reynolds claimed to be kin to the "fowler". I haven't seen any similar report online.
One part of the story I can't figure out is:
Jamie Reynolds goes home to his father and tells him about the shooting and his father advises him not to run but stay in "his ain country."
Then Molly's ghost appears to her uncle. Who is her uncle? They aren't married and this seems to me it should be his father instead of her uncle. Just wondering?