Traditionally, a coroner＇s report in ancient China would have a corpse illustration attached to it, recording and describing any found injuries. Yet in such homicide cases that only skeletal remains were left to be examined, an illustration of the corpse did not sufficiently serve the forensic purposes. Trying to solve this problem, the Ministry of Punishment of the Qing court promulgated official skeletal diagrams - the ＂Bone Inspection Diagrams＂. A few superfluous bones, however, appeared in these diagrams. With description of the features of some of the superfluous bones, this paper explores the possible documentary roots of their occurence, which, in our view, can be understood both through the practice of naming the bones, and through the knowledge-shaping process of human bones, as well as the collateral nature of the government-promulgated Washing Away of Wrongs Collated by the Bureau of the Code.