[Bloomfield has set up the Proto-Algonquian clusters *xk and *xp, using x to represent an undetermined phoneme preceding k and p. This paper proposes to show that *xk consists of two clusters in the parent language, namely *θk and *xk. In addition to establishing the validity of a new Proto-Algonquian cluster, it gives the reflexes for the principal Eastern Algonquian languages and postulates the stages of development.]