I am a descendant of Joseph Pack, who was born either in 1745 or 1748 to Mary Anne Packard and, supposedly, to William Augustus of Hanover, Duke of Cumberland. I heard that it is mentioned in a rare book called "England's Turbulent Eighteenth Century" by James Boswell. The only inaccuracy I found was that he mistakenly said in the book "William, brother of George II" when he meant "William, Son of George II" Can anyone confirm or deny this family story?