I have a fair amount of info on Francis Floyd and Isabel Johnstone. You probably know that Isabel comes from a distinguished line going back to an Earldom of about the sixteenth century. My search indicates that Francis may be one of my ggg... uncles. The Johnstone line is well documented as published in some UNC papers I have. My Floyd research goes back to the grandfather of Francis, his brothers and children. I will send you a list of my material right away.