Thanks to all of you for the efforts and suggestions you have made. I really do have a number of questions on this marriage that will remain unanswered by the looks of it. ( even though I managed to get it down to Church of Ease for marriage ) I went to see if there was a chance of something being found in the IGI and went through all of Aberdeen ( all the counties listed ) for the time period covering 1801 and was amazed that when I searched under the marriages I could find " NOTHING " for either William Dunn or Barbara Thomson when using their surnames.
Either I am under a massive cloud of confusion or there's a skeleton in someone's cupboard whose really tying to put me off on this search. I'm not sure if I can even find a death notice for William that could set me off on an age to look for. Too bad they didn't have a telephone directory then. I could just look him up and give him a call and ask what the hell he's playing at. with all this mystery. ( must think he's James Bond or something.)