This last book of Mrs. Pierson's has all the charm of the earlier volumes. The adventures of Mother Eel, the Playful Muskrat, the Snappy Snapping Turtle, and the other Pond People, will be eagerly followed by children, whether they are naturalists or ordinary readers. The fact that one does not continually feel that she is writing for the purpose of instructing the young, gives Mrs. Pierson her hold on so many boys and girls. The books teach a great many lessons, but one does not feel that the author is lying in wait to enlighten the unwary youngster.