Of these stations, with their officers and troops, only those as far as Magna are in Northumberland; the rest continue the chain of defences across Cumberland to the Solway Firth. Besides these stations, there were _castella_ at the distance of every Roman mile (seven furlongs) along the Wall, from which circumstance they are known as “mile-castles.” They provided accommodation for the troops necessary between the stations, which were at some distance from each other; and between each two _castella_ there were also erected two turrets, so that communication from one end of the Wall to the other was speedy and certain. All traces of the station of Segedunum (Wallsend) have long since disappeared; the Wall from there, beginning actually in the bed of the river, ran almost parallel with the N.E.R. Tynemouth Branch, a little to the south of it, and climbing the hill to Byker, went down the slope to the Ouseburn parallel with Shields Road, crossing the burn just a little to the south of Byker Bridge. From there its course has been traced to Red Barns, where St. Dominic’s now stands, to the Sallyport Gate, and over the Wall Knoll to Pilgrim Street; thence to the west door of the Cathedral, and on past St. John’s Church, up Westgate Road. The station at Pons AElii, it is generally agreed, occupied the ground between the Cathedral church of St. Nicholas and the premises of the Lit. and Phil. Society. Following the Wall up Westgate Road, we are now out upon the highway from Newcastle to Carlisle, which, as we have seen, is upon the very line of the Wall for nearly a score of miles. At Condercum (Benwell) the next station, garrisoned by a cavalry corps of Asturians from Spain, a small temple was uncovered in the course of excavating, and two altars found still standing in their original position. Both of these were to a deity unknown elsewhere, given as Antenociticus on one, and as Anociticus on the other. The former was erected by a centurion of the Twentieth Legion, the Valerian and Victorious, whose crest, the running boar, we shall meet with more than once in our journey.