The two incomplete Dunhuang books on divination, numbered S. 3395 and S. 9987B1V, are two fragments of a same hand-copied book and can be pieced together. This paper, through a survey of the chapter division, language and content explanation of the incomplete books, has compared them with other Dunhuang books of similar content and come to the conclusion that they were collections of various divining books or methods of divination at the time which reflected the development of divination in the Tang Dynasty.
