ABSTRACT
The book called Yijing consists of Zhouyi bound up with a collection of essays and commentaries known since Later Han (AD 25–220) as the Ten Wings. Although the Ten Wings give very little help in understanding Zhouyi as a Bronze Age document, there are three reasons why they should be treated at some length here: first, because they illustrate, as nothing else can, the climactic changes in the Chinese approach to Zhouyi after the Bronze Age, changes that need to be understood if the Bronze Age document is to be rediscovered; secondly because they have been cited earlier in this book and are important to many of my arguments; and thirdly, because a description of them may assist readers who, when they approach Yijing for the first time, have difficulty in distinguishing the text from the mass of commentary in which it is usually embedded.
