It is by no means improbable that some of Cadwalla's exploits, mythical as well as real, have become inextricably interwoven with the legendary ones of the heroes of the Arthurian romances. Singularly enough a paragraph in Geoffrey of Monmouth's work would seem to countenance this. In book 12, chapter 2, of his so-called "History of Britain," he refers to negotiations being entered into and afterwards broken off, in the year 630, by Cadwalla and Edwin, while their armies lay on the opposite banks of _the river Douglas_, the scene of the presumed Arthurian victory over Colgrin in the year 500, according to the same authority. This circumstance is not without significance, as the legendary Arthur has evidently absorbed no inconsiderable portion of the reputations, in the North of England, of Urien of Rheged, and other veritable British warriors. Indeed, Lappenberg says--"The Welsh historians adopted the policy of _purloining from a successful enemy_, and skilfully transferring to his British contemporaries, if not to _imaginary personages_, the object and reward of his battles, the glory and lastingness of his individuality in history;" and, as illustrations of this practice, Mr. Daniel H. Haigh, in his "Conquest of Britain by the Saxons," adds, "Thus, Cœdwealha, Ine, and Ivar are claimed by them as Cadwaladyr, Inyr, and Ivor." Mr. Haigh, notwithstanding his faith in the substantial accuracy of much of the contents of the works of doubtful authority, says--"The peace which Ambrosius established was broken in the following year, A.D. 444. The Brut says nothing of this affair; it rarely records the defeats of the Britons." And, similarly, the Saxon chronicle is equally reticent in the opposite direction!