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
Leahill Turret, Hadrian's Wall Leahill Turret, Hadrian's Wall Leahill Turret is a typical example of one of the lookout towers located between the milecastles on Hadrian's Wall in Cumbria; located on the Lanercost Road near Banks, Parish of Waterhead. It is designated turret 51b and lies east of the Signal Tower at Pike Hill. Leahill Turret lies on the lower slope of Allieshaw Rigg; Milecastle 52, Bankshead, is 540 yards to the West, Turret 51A, Piper Syke, lying 540 yards to the East and Milecastle 51, Bowers Wall 540 yards to the East of it. Leahill 51b was built shortly after AD 122 as