Catherine Lawson, married Archibald McWatt on 20-10-1865
They had Andrew Lawson McWatt on 19-07-1868 - one of at least 5 children.
Catherine's sister Elizabeth Lawson married Francis McWatt on 03-06-1859. They had at least 7 children including Andrew McWatt on 20-02-1862.
I have lots of McWatt info.
Best wishes, Isobel