《水经注·卷八》
城中有台，高二丈左右，台下临水。从前鲁侯在棠观鱼，就指这地方，在方与县老城以北十里。
城有台，高二丈许，其下临水，昔鲁侯观鱼于棠，谓此也。在方与县故城北十里。
There is a platform in the city, about two meters high, and the water is under the platform. It is said that when the former Lord of Lu watched the fish in Tang, he referred to this place, ten miles north of the old city of Fangyu County.