Title: Useful Anachronisms: The Rwandan Esoteric Code of Kingship
Abstract: Any mention in a text to something demonstrably more recent than its attributed date of composition is an anachronism. The presence of an anachronism is absolute proof that the purported date given for the redaction of the final the text is wrong and that the real date occurred later than the date implied by the anachronism. In rare cases an anachronism can also occur in reverse, namely, when it can be shown that the anachronism implies the presence of something (an archaism, a practice) which had been replaced or had disappeared by the purported date for the manuscript. Anachronisms can be very useful both to date a document and in some cases to show us something about the dynamics involved in the creation of a text. The detection of anachronisms is common with regard to written documents, but they can also be used for the study of oral documents which have been memorized word by word, especially when only one version of such documents has survived. That is the case for the Rwandan esoteric code of kingship, which yields an excellent example of how a systematic search for anachronisms throws light on such a document and allows a historian to use its contents with much greater confidence than was the case otherwise. Ubwiiru is the name given in Rwanda to a set of eighteen pieces in prose, called “roads” or “ways,” which vary in length between 74 and 1252 lines and were learned by heart since “immemorial times” by specialists called abiiru .