WHEN king Wû overthrew the dynasty of Shang, the domain of its kings was divided into three portions, the northern portion being called Phei, the southern Yung, and the eastern Wei, the rulers of which last in course of time absorbed the other two. It is impossible to say why the old names were retained in the arrangement of the odes in this Part of the Shih, for it is acknowledged on all hands that the pieces in Books iii and iv, as well as those of Book v, are all odes of Wei.