The stretch of Hadrian’s Wall between Poltross Burn (MC48) and Willowford Bridge (below Birdoswald fort) is the most westerly section of the original stone wall. The turf wall started to the west of the river Irthing (and Willowford).
The wall had been planned to have been built to a width of approximately 10 Roman feet, but here it was constructed to a narrower scale of 8 Roman feet (but on the broad wall foundation). It appears that a more modest scheme was adopted to ensure the completion of the project.
Heritage Futures 