Very nice work! Right up my alley, of course. And a nice job of pulling supporting evidence from the text. I've been pondering the minutiae of Dunk & Egg, and I'm finding that any and every "crossing" is important: bridges and fords, in particular, but I suspect that dreams will also be "crossings" as they represent a state between life and death. Of course, the raven can fly back and forth through the door between life and death. Crones can peer through the door, but don't necessarily