It's not an actual quest, but it intrigues me. After you get the castle north of Chorrol, If you look around the private quarters in the study area, you should find a secret door. In the room there is an exit to the roof of the castle and various items. One item in particular caught my attention, the journal of the castle previous owner. In his journal, it says that he sealed two people in a secret door which was hidden in the training room. I go there, and find the secret door. Going into the cave, you fight the two people sealed inside. One of them has a note with them that states something that I can't remember. If anyone else has found this out, is this the end if it, or is there more? I have a strong feeling there is more, but cannot seem to find out how to progress.