There has been much discussion about this matter. As we shall see, there is good reason for connecting the name of a later emperor, Severus, with the building of the wall, but, on the whole, the testimony of inscriptions and the labours of archæologists tend to confirm the clear statement of the biographer Spartianus (writing, it is true, a century and a half after the event): “Hadrian visited Britain, in which island he corrected many things that were amiss, and was the first to draw a wall across for eighty miles, in order to divide the barbarians and the Romans”. In all the long list of Roman emperors it would be hard to find a more fascinating figure than that of this great wall-builder. By no means the best of his class, far surpassed in moral excellence by Trajan, Antoninus and Marcus, but removed by an immeasurable distance from the worst, from such men as Nero, Domitian and Commodus; architect, artist, author, and, above all things, indefatigable traveller, Publius Ælius Hadrianus united a truly Greek versatility and brilliancy of intellect to all the Roman’s strong sense of duty towards the great _Res Publica_, and willingness for Rome’s sake to sacrifice many of the sensual gratifications in which his soul only too clearly delighted. The traveller who wanders for hours through the ruins of the vast collection of luxurious palaces which is called the _Villa Hadriani_, or who, in sunny Athens, sees the arch which bears the proud inscription, “On this side the city of Theseus, on that the city of Hadrian,” can in some measure realise the self-denial which must have been involved in Hadrian’s presence with the legions during the setting out of eighty Roman miles of wall[16] across the misty moors of Northumberland and Cumberland.