In a miscellaneous post for Careg-y-Bwci mention was made of it being presently considered as a Roman structure because of a Roman road's proximity, against which the poster said that it was more that Roman roads often went by prehistoric monuments. Well boys and girls, whisper it quietly that many of the Roman roads were comprised of (usually smaller) sections of prehistoric trackways and roads joined up (just as they in turn became part of our modern roads and even motorways). In like manner major linear prehistoric earthworks were taken over by the likes of Offa's Dyke.