The camp on the northern face of the hill has been constructed upon the same principle, but is in a less perfect condition. It is of the same length, but has only half its breadth. A covered way conducts from the one to the other. It is probable that both these camps have been the summer quarters, _castra æstiva_, of the garrison at Middleby. So important a position would not, however, at any period of the year be abandoned to the enemy; 'when not filled with the tents of its summer inhabitants, it is probable that a small garrison was maintained on its summit.'[133] [Sidenote: CAMP AT PLUMPTON.] _PLUMPTON._—Several camps south of the line, and at nearly equal distances from the Wall and from one another, added security to the fortification in the western district. Plumpton, or Old Penrith, called in the locality by the common name of Castlesteads, is a large station about thirteen miles south of Carlisle. The conjecture of Horsley ascribed to it, the name of BREMETENRACUM. The turnpike-road goes close past it, as did the ancient Roman way which led from LUGUVALLIUM to the south of Britain. The station presents the usual characteristics of a Roman camp. Though not much elevated, it is sufficiently raised to enjoy a most extensive view of the surrounding country. The western side is the strongest, being protected by the deep but narrow valley in which the river Peterel flows. Its ramparts are boldly marked, and the interior of the station is filled up to their level by a mass of prostrate habitations. The largest heap of ruins is on the north-east quarter; it may be the remains of the pretorium. The fosse is well defined on the north, south, and west sides. Enough of the eastern gate remains to shew that it has been a double portal. One stone of the threshold yet retains its position; it is worn by the feet of the ancient tenants of the city, and is circularly chafed by the action of the door in opening and shutting. Several very large stones, which have been used in the construction of the south gateway, lie near their original site—some of them yet exhibit the holes in which the pivots of the doors turned. The line of the street, which went from the eastern to the western gateway (_via principalis_), is discernible. On the outside of the south-east corner of the station, an arched chamber, or passage, was discovered a few years ago; but it is now filled up with rubbish. [Sidenote: OLD PENRITH.] Extensive remains of ancient foundations have been removed from the field on the east of the station; here, according to tradition, Old Penrith stood. There are also indications of suburban buildings to the west of the station. In the neighbourhood of the camp, and even at some distance from it, we meet, in the houses and stone fences, with such a number of the small neat stones which were usually employed in the construction of Roman dwellings, as to impress us with the idea, that the suburban buildings were very extensive in every direction.