http://www.angelfire.com/ma4/mlarchives/faq/coldhands.html A good discussion about that here from that link Yoadm gave us in the Q&A thread. It's possible, but there's not quite enough info to confirm it. I think Sandor Clegane still has a role to play. If Martin wanted him dead, it would have been simple enough for Arya to kill him. What's one more death in the book. But the fact she doesn't, means we'll probably see him again. I hope so. He's not completely evil like his brother, but very complex.