Yonne, Burgundy, France. The Péruseau at the Bonnins hamlet. This hamlet is split over two "communes" : Charny and Perreux, and the limit passes right along the bridge on the upstream side. Here, looking upstream towards Perreux. This section of the Péruseau is on Perreux commune. 50 meters further up, the Péruseau receives its tributary the ru des Josselins on its right side (thus here on the left).