Hmmm, and a daughter of Tash and Jadis might give herself airs, thinking she was better than her mother, but not be able to defy her mother because Tash wouldn't help her. So the daughter might run away--in the one direction that is LEAST covered by Lewis' sporadic geography, namely west. My own writings, and Evening Star's, have both speculated on primitive, less-organized human tribes out that way. Perhaps the daughter found and dominated one such tribe; this tribe had knowledge of Bizm; and the daughter moved on to take over Bizm.