In the year 1740, Charles VI., emperor of Austria, died. He left a daughter twenty-three years of age, Maria Theresa, to inherit the crown of that powerful empire. She had been married about four years to Francis, duke of Lorraine. The day after the death of Charles, Maria Theresa ascended the throne. The treasury of Austria was empty. A general feeling of discontent pervaded the kingdom. Several claimants to the throne rose to dispute the succession...