The chief highways of the Romans, known to us for the most part by the names given to them by our Anglo-Saxon forefathers, converging, as most of them do, towards “the town anciently named Londinium,” coincide in a remarkable manner with the main lines of our modern railroad communication. The Watling Street, running from the neighbourhood of London to Etocetum (a little north of Birmingham) and thence to Deva (Chester) and so on into Lancashire, corresponds with the London and North-Western Railway; while another road which generally bears the same name and which traverses Yorkshire and Northumberland is less accurately represented by the North-Eastern. Erming Street, from London to Doncaster, is often not far from the line of the Great Northern; and Abona (on the Avon near Bristol) and Isca Damnoniorum (Exeter) were reached by roads bearing now no special names, but imitating in their general course the Great Western and South-Western Railways. One great artery, the Fosse Way, may be clearly traced between Axminster (in Devonshire) and the great colony which now bears the name of Lincoln; but this road has no representative in our railway system. The imperfect character of the Roman conquest of the district which we now call Wales is evidenced by the feeble and fragmentary traces of Roman roads now to be found in the principality. There was, however, a road traversing the country from north to south, from Carnarvon to Carmarthen, and thence by a somewhat circuitous course to Caerleon-upon-Usk, and part of this road is still known by the name of Sarn Helen. Is it possible that there is in this name some vague and inaccurate remembrance of the mother of Constantine?