finished up RttW and I am still confused about a number of things. 1) Why exactly does Scylla want to return to her body buried in Nessus? 2) What was the deal she and Horn made with the Megatherian Scylla? 3) Why does Severian say the bird (that has to be Oreb) belong to Master Malrubius? 4) Where does the Whorl going when its relaunched?