Mr Hiram B. Otis, the American ambassador, bought an old house. It was called Canterville Chase. Everyone told him he was doing a very foolish thing, because everyone knew that there was a ghost in the house.
Even though he was selling the house, Lord Canterville felt that he really should tell Mr Otis about the ghost before he brought the house. Lord Canterville was an honest man, and he did not want to hide anything.