Considered to be one of the greatest of Scotland's medieval kings, David I--the youngest son of King Malcolm III and St. Margaret--was never expected to succeed to the throne. During the reigns of his elder brothers, David carved out a career for himself as an Anglo-Norman nobleman at the court of his brother-in-law, Henry I of England. With Henry's backing and the support of his elder sister, Queen Matilda, David secured a good marriage and a rich...