The Historia Brittonum is an important, though problematical, source for the history of Britain from Roman times to the 680s, containing a brief outline of events in this period, as well as assorted supplementary material, including an account of the Ages of the World and various genealogies of Anglo-Saxon royal houses. It has traditionally been attributed to a ninth-century Welsh scholar called Nennius, who was in fact responsible for one redaction of an existing work (no longer extant in its original form) produced in 828-9 by an anonymous Welsh author using a wide range of historical sources, some of which appear to derive from oral tradition. The Historia emanates from north Wales but shows detailed knowledge of Anglo-S…
Magennis, Hugh. "Historia Brittonum". The Literary Encyclopedia. First published 20 September 2002; last revised 30 November -1.
[http://www.litencyc.com/php/sworks.php?rec=true&UID=10514, accessed 26 April 2015.]