But the most interesting discovery in this quarter was that of the milestone dedicated to the Emperor Victorinus (one of the Thirty Tyrants), which was unearthed in 1879, and is now to be seen in the Lincoln Museum. It was found probably on its original site, where the cross street entered the Forum from Ermine Street. Victorinus held the supreme power in Gaul for little more than a year, so that the erection of this stone can be placed with certainty in A.D. 266-7.[15] This discovery confirms the reading “Segelocum” in the _Antonine Itinerary_, and also the distance there given. Some have thought that Carausius, the “Menapian admiral,” who seized the reins of power in Britain twenty years later under Diocletian, resided for some time in Lincoln. For this there is not much evidence. His coins, of which there are 300 known types, are common not in Lincolnshire only, but in all parts of England; and he is more likely to have established himself in London or near the south coast. But it is possible that the northern wall of Lindum, in which some of his coins have been found, was repaired in his time or a little later. Less than half a mile north of Newport Arch are to be seen remains of an earthen rampart, with a fosse on the northern side extending about 350 yards east and west, and with entrenchments running from the corners at right angles towards the city. Stukeley imagined that these were the defences of the British “oppidum”; but their shape and the practical certainty that the Britons would choose the edge of the hill leave little doubt that they are Roman outworks, possibly enclosing a northern suburb.