The border reivers information is most interesting to me, especially the mentions about viking "infiltration" in Scotland. I have a close friend who is Scots/Irish and also has information passed down in her family about viking ancestors. This friend is manic-depressive and her doctor here in Michigan has made a 20 year study of the connection between Celts with scandinavian blood and manic-depression! He says the combination of the two heiritages produced a mutant gene that causes manic-depression. He claims thats the reason so many Irish people drink excessively - they are self- medicating their symptoms with alcohol.....Has anyone heard anything like this! ? I also have both Scots/Irish and Scandinavian blood as does my husband............Now I m worried!! Not for me - for my children!