When he realized how far north he had come in his search for Arwyn he knew Kingsfall wasn't that far. He also knew Hearthwood River to be there as he had visited Lachesis the previous year. He didn't know if his daughter had traveled this far or if there was any chance that the river wolves might have seen her. He remembered when Adelayde had come to inform them in White Fir Notch of the disappearance of one of their pups. It wouldn't hurt to ask the river wolves to look out for Arwyn at least.