In the book, a pauper exchanges places with Prince Edward VI in London. While pretending to be the prince, the pauper meets Henry VIII, who later dies.
What I assume Mr. Twain did not know was the Edward VI was no where near his father around the time of his death. Edward was living in a far off English country home with his half-sister, Mary. Edward did not even know that his father had died until almost a week after it happened. This information makes the entire book...impossible.