How much time passed between Lord Tywin's "retreat" from the Red Fork and the "Battle of the Blackwater"? At what point between these events did Catelyn's last chapter occur?
Sigh. Obviously you are not a fan of my policy of deliberate vagueness about things like times and distances. I do hate to be pinned down...I will say, however, that Catelyn's final chapter takes place =before= the Battle of the Blackwater. As do the first few chapters in A STORM OF SWORDS...