Hi again Linda - just been working through your post, very interesting! Are you saying you have copy of Graham/Scott marriage in 1875? If so, any chance of posting a copy/pic as I would love to see it. As you know, there are records/references to John Graham, mother = Margaret Irvine but that John was born 1847 and father was Joseph Graham. As I said, my info of past Grahams came from Mrs Annet in Kilkeel but I never established from her where she gained the information. I remember that I did ask her if there were any gravestones in the churchyard and she said 'no'. I also wrote to the Mourne Pres Church but never received any reply and think I got the impression from her that what she said was all anybody knew and not to bother the church. If you were thinking of going to Kilkeel, visiting her might yield answers (my last letter didn't get any reply). Equally, if what Maud's son said was true and he left them, this might explain things. My mother-in-law clearly remembers going to the church with the family when she visited.
Have you found any record for John Graham's death which might fix his birth?