I believe Mary Finlayson who married Norman Stewart in Sconser in the late 1700s is the sister of my great great great great grandfather Donald Finlayson of Sconser who married Chirsty Macmillan of Peinchorran, Braes. The names and ages of their children are similar to the names and ages of Donald and Chirsty's children. Unfortunately, I don't know who Donald and sister Mary's parents were? How can I find out? Will we ever know?