Unfortunately, I've hit a tentative dead end in my tree as well. As a matter of fact, I've found that there is no concrete evidence that I'm related to the Caswell Donnelsons (though I still think there is a strong chance). I'm sorry I couldn't be any help. Do you happen to know much about Rebecca's siblings? I'd love to hear what you know about her family as well to see if it lines up with anything in my tree.