John Morris (historian) - The Age of Arthur

The Age of Arthur attempted to build a picture of Britain during the period 350–650, when the theoretical King Arthur was supposed to have existed. The book is not, however, exclusively about Arthur, but on the entire history of Britain during the era. The book also includes detailed chapters on Brittany on the grounds that the Celtic population of Brittany after the migrations from "Greater Britain" meant that "Little Britain" (Brittany) was as much heir to Roman Britannia as were England, Wales and Scotland.

The book was heavily criticized in historical circles and Morris' academic reputation was severely damaged in the eyes of many of his peers as a result of its publication. David Dumville launched a famously scathing attack on the methodology adopted by Morris, and while one of the most influential reviews of The Age of Arthur described it as "an outwardly impressive piece of scholarship", it went on to argue that this apparent scholarship "crumbles upon inspection into a tangled tissue of fact and fantasy which is both misleading and misguided". Others, such as James Campbell, were more generous, but still considered that the Age of Arthur was so misleading and full of problems that it was really only of use to professional historians who could sort the interesting ideas from the flights of fantasy.