A raven disguise? How absurd. From the stuff available here by the door you construct a quick crow disguise and confidently move amongst the others in the castle. Sneakily listening to their conversations, you overhear there's apparently two stolen treasures somewhere in the castle. Well, now, that's something you can definitely take a slight detour for. You've never seen a proper stolen treasure before, and it sounds like one is in the study of the castle, and one is in the library