"This is most extraordinary! But I beg you, Miss Spencer, to entertain my explanation of it, for it will be truthful, if a little intractable to believe. There is a door, Miss Spencer, in the attic portion of my father’s house, which is a place unvisited except by servants and myself. Were this door to open, which it does not, it would give upon the empty air four stories high, for there is no room beyond. It is a door entirely without sense. One may not pass through it, try as one might. Until this day! For you, Miss Spencer, have opened this door for me. You are the key!"