Either cutting acrosefrom Tonnerre (home of a beautiful circular lavoir at the Fosse Dionne) or starting out from the village of Chablis, follow the course of the little Serein river (a tributary of the Yonne) toward Avallon.
It is the most direct route to Avallon.
mnli hypothesis: It is the most direct route to Avallon. premise: Either cutting acrosefrom Tonnerre (home of a beautiful circular lavoir at the Fosse Dionne) or starting out from the village of Chablis, follow the course of the little Serein river (a tributary of the Yonne) toward Avallon.