Roman Cumbria to Wallsend on the Tyne estuary, with additional military installations running down the Cumbrian coast from Bowness to Risehow, south of Maryport, in an integrated fashion (and with forts at Burrow Walls and Moresby that were perhaps not part of the system). Historians believe that the Turf Wall from the River Irthing to Bowness-on Solway was rebuilt in stone in two stages. The most easterly five miles were rebuilt at the time of Hadrian, with the remainder being rebuilt after 150 AD. However, this is open to dispute: it is uncertain whether the building works in the second half of
Cromarty Firth Cromarty Firth The Cromarty Firth (; ; literally "kyles <nowiki>[</nowiki>straits] of Cromarty") is an arm of the Moray Firth in Scotland. The entrance to the Cromarty Firth is guarded by two precipitous headlands; the one on the north 151 metres high and the one on the south 141 metres high — called "The Sutors" from a fancied resemblance to a couple of shoemakers (in Scots, "souters") bent over their lasts. From the Sutors the Firth extends inland in a westerly and then south-westerly direction for a distance of 19 miles (30.6 kilometres). Excepting between Nigg Bay and Cromarty Bay where