Turret 49B
Turret 49B (Birdoswald) (grid reference NY61136620) lies 340 metres west of the west rampart of Birdoswald fort.[5] It was excavated in 1911.[5] The masonry remains have been consolidated and exposed.[5] It replaced the earlier turf wall turret (49B TW; grid reference NY61146607) which was dismantled when the stone wall was built.[6]