THE two main Roman roads that ran north and south through Britannia Secunda were the Sam Helen, starting from Caermarthen (Maridunum) and terminating in Segontium by the route of Llanio and Penalt, and the road from Neath, or near Neath (Nidum),by Cas...
THE two main Roman roads that ran north and south through Britannia Secunda were the Sam Helen, starting from Caermarthen (Maridunum) and terminating in Segontium by the route of Llanio and Penalt, and the road from Neath, or near Neath (Nidum),by Castell Collen, Caersws, and Mediolanum, where, turning sharp to the left, a branch passed somewhere near Bala and so on to Caernarvon, while the main line continued straight on