and there killed many Welsh and drove some to flight into the wood called Andredes leag. 485: Here Ælle fought against the Welsh near the margin of Mearcred's Burn. 491: Here Ælle and Cissa besieged Andredes cester, and killed all who lived in there; there was not even one Briton left there. The Chronicle was put together about four hundred years after these events. It is known that the annalists used material from earlier chronicles, as well as from oral sources such as sagas, but there is no way to tell where these lines came from. The terms 'British' and 'Welsh' were used interchangeably, as 'Welsh' is the Saxon word meaning 'foreigner', and was applied to all the native Romano-British of the era. Three of the places named may be identified: "Cymen's shore" ("Cymenes ora" in the original) is believed to be located at what is now a series of rocks and ledges, in the English Channel off Selsey Bill, on the south coast, known as the Owers. It has been suggested that Ower is derived from the word ora that is found only in placenames where Jutish and West Saxon dialects were in operation (mainly in southern England). It is possible that the stretch of low ground along the coast from Southampton to Bognor was called Ora, "the shore", and that district names were used by the various coastal settlements, Cymens ora being one of them. The wood called "Andredes leag" is the Weald, which at that time was a forest extending from north-west Hampshire all through northern Sussex. "Andredes cester" is thought to be Anderitum, the Saxon Shore fort built by the Roman rebel Carausius in the late 3rd century at Pevensey Castle, just outside the town. Some believe Andredes cester may have been an imperial stronghold somewhere else as Henry of Huntingdon described the place as a fortified city and gave a very full account of the siege which is inconsistent with the geography of ancient Pevensey and little archaeological evidence of sustained settlement there. Also, in his "Britannia", William Camden suggests that it could be Newenden, Kent. The Chronicle mentions Ælle once more under the year 827, where he is listed as the first of the eight "bretwaldas", or "Britain-rulers". The list consists of Bede's original seven, plus Egbert of Wessex. There has been much scholarly debate over just what it meant to be a "bretwalda",