Unpleasant Wraith

In an ancient castle set of rooms in which a ghost haunting the Lord. He can not rest, because once his wife, stepmother of his son broke his will. In his will, it was stated that the Lord gives his son the castle and all that is in it. Wicked wife could not let that happen and to break the will of his scattered through all the rooms. Now I have to spend a lot of time in search of scraps and hints.