Arya is now a prisoner of Sandor "The Hound" Clegane. She tries to kill him and/or escape and he stops her every time, harsh but fair. It's raining. The river is flooded. The villages near the river are flooded. Someone should build an ark.
They cross a river, paying the ferrymen with paper money. They aren't too happy about that. It'll never catch on.
The Hound finally tells Arya that he's not taking her to King's Landing (he's fed up with Lannisters now) but to the Twins to see her mum so he can get the ransom. And he's not so bad at all, and is even amused that his brother GREGOR managed to lose Arya without knowing who she was. He probably could have saved a lot of trouble had he told Arya all this in the first place, though. He's looking like a faster ticket home than the Brave Companions were.
But will he get there in time for the wedding, or only after Robb has gone off to Moat Cailin and Catelyn to Seaguard?