See also:
Historia Britonum Latin text of Nennius's history of the British people, from Six Old English Chronicles, edited by J. A. Giles. http://www.fordham.edu/halsall/basis/nennius-full.html
Nennius, The Indiscriminate Chronicler Short biography by Tom J Rees of the 9th-century Celtic historian, describing his works and comparing him to an Anglo-Saxon counterpart, the Venerable Bede. http://www.brighton73.freeserve.co.uk/tomsplace/interests/medieval/nennius.htm
Nennius' Wonders of Britain Geographer Andy Evans traces a list of natural wonders attributed, traditionally, to the monk Nennius, and written around 829. http://www.wondersofbritain.org