In 1977, we were innocent of Joseph Campbell and the further annotations Mr.
The Four Books are short for The Texts and Annotations of the Pour Books, which were compiled and annotated by Zhu Xi, a Neo-Confucian scholar of the Southern Song Dynasty to establish his own theoretical system of li or Principles.
He drew the Armillary Sphere Map, annotated the Book of Changes and wrote the Annotations on Canon of Supreme Mystery.
Let us look at its annotations given by Yanshigu:"They gain half a day 's time every night and, they have forty-five days in a month.