David, Did you get any further with the kellys, My Mum (Deirdre Duddy's Sister) Remembers her mother telling her about the time she went to the Kelly's in Roscommon in the 50's where they met a relation Mr Kelly who was in his 70's (Name escapes my Mother) but he had a 7 year old daughter.
She also has a photo of when she went to the Pub in Partry as a 13 month old child. My Mom was very sick at the time with enteritis and was given a hot port and lemon by the Aunt, not sure if it was Mary or another Cannon. Might have some photos of when my Grandad went to Roscommon on a motor bike with the young kelly's on it.