Thank you for information you have given, I have taken several days to ponder on this ( always good ). To explain my actions, in the absence of any other information, my investigations have led me to a family of Campbell living at the correct time, based in the appropriate town area of Magherafelt. It is true that this might not be the correct family, however, if as you say, you have evidence of a further ten people, living within what could be the correct area, I would be delighted to have the opportunity to be able to investigate those.
As you stated ten people, it might help whittle them down to a Cristian name of James. I have found the help and support from rootschat to be both helpful and very informative so a very big thank you guys.