Section of the NNE/SSW line of 'Sarn Helen' Roman road, linking Roman forts at Llanio and Trawsgoed, partly fossilised here by the country road but surviving as an extant earthwork or 'agger' where the country road deviates from the generally straight course of the Roman road. Recorded during RCAHMW aerial reconnaissance.
T. Driver, RCAHMW, 13th Nov 2009.