Hello David, I am very pleased to hear from you. I think we must certainly be related. I am descended from Francis and Isabella's son Francis, who moved to Dunfermline, Fife, and had a large family. His son, Thomas, was my great grandfather, and Thomas's son Francis (who died in 1940) married Jane Brown in Glasgow on July 5 1895 and had eleven children. I am descended from their son George, number 10 in the line up. My father and his siblings have all passed away, but out of 17 grandchildren there are 13 of us still alive, and we get together as often as possible.
If you would like to get in touch direct, my email address is firstname.lastname@example.org I have photos of Francis and Isabella's grave in Kirk o' Shotts cemetery and will be happy to pass on any info I have.
Many thanks for getting in touch, and I look forward to hearing from you again.