Thank you for your help, the Mary Fleming you have found is about the right age as she was married 1821, so that would mean her birth would be about 1798. I have an Isabella Fleming who married James McCormick 1849 (direct ancestors) they give their address as Ballydorn, I presume that is a village/township of Banbridge. How could I find where she is buried as there is a good possibility that Alexander is interred there as well. The 1901 Census Doughery Banbridge had a William 82, his family and also his sister May Ann 75, they both died in 1905, (on Ancestry UK) I have found them to be siblings of Isabella Fleming children of Alexander and Mary. Another son Alexander died in US 1906.
Regards
Margaret