Hello Margaret,
I was just searching on Wellrigs and your message came up, even though you made it last year.
Agnes and James were my g-g-g-g-grandparents. My g-g-g-grandfather, Robert, was born at Wellrigs on 17 Feb 1810. He also had a brother James, he is the witness on Roberts death record.
This is the only information I have on them apart from their marriage record. I have looked ay Wellrigs on Google Earth and can see the farm is still there. I am based down in England so all my searching is online. Robert married Margaret Davidson and ended up in New Lanark where he died a pauper.
Best Regards
Andrew