Significance of Harrows Scar Milecastle and Wall

This stretch of Hadrian’s Wall has played a significant part in enabling archaeologists to work out the building sequence of the turf Wall sector, where the Wall was originally of turf and later rebuilt in stone.

Schematic plan of the area between Birdoswald Roman Fort and the river Irthing — Plan of the area between Birdoswald Roman Fort and the river Irthing, showing how the stone Wall west of Harrows Scar Milecastle (milecastle 49) diverged from the line of the earlier turf Wall. This stretch of the Wall is the only place where this occurs © Based on Ordnance Survey data. Crown copyright 2014. All rights reserved. Licence no. 100024900

Building Sequence

Investigations on this stretch of Hadrian’s Wall have revealed:

the original turf Wall and its milecastle, discovered during 19th-century excavations designed to trace the turf Wall^[1]
the divergence of the stone Wall from the line of its turf predecessor
the replacement of the turf Wall milecastle in stone
on the stone Wall, the presence of ‘centurial’ stones in their original positions, marking the names of centurions in charge of the work parties building the Wall, and indicating the lengths of Wall for which individual work parties were responsible.

Centurial stone set within the wall at Harrows Scar — One of the centurial stones at Harrows Scar. The name of the centurion responsible for the work party building this stretch of the Wall, Tertius, is still clearly visible

Later History

The milecastle is notable for its reuse in post-Roman times.
We know the name (Henry Tweddle) of one of the inhabitants of the house built within the milecastle.

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Footnotes

1. F Haverfield, ‘Report of the Cumberland Excavation Committee, 1898’, Transactions of the Cumberland and Westmorland Antiquarian and Archaeological Society, old series, 15 (1899), 345–64 (accessed 21 March 2014); E Hodgson, ‘Notes on the excavations on the line of the Roman Wall in Cumberland, in 1898’, Transactions of the Cumberland and Westmorland Antiquarian and Archaeological Society, old series, 15 (1899), 365–76 (accessed 21 March 2014).