Information about the Roman Wall
Hadrian's Wall is a World Heritage Site with a length of 80 Roman Miles (73.5 Standard miles) ran from SEGEDUNUM (Wallsend on Tyne) to MIAI (Bowness on Solway).
The Vallum lies to the south of the Wall and was the line deliniating the extent of the Roman Empire The purpose of the wall was to defend the line.*1
The relative complexity of the Vallum confused early scholars who considered it to be a defensive ditch.*2
The ditch was employed throughout the length of the wall except where terrain made it unnecessary or impractical.
Some forts were amended on Hadrian's instructions to extend northward their gates giving easier access for a swift cavalry deployment.
The Stone Wall was constructed for 23 miles but it was not long before it was decided to amend the width to 8ft and in some places 6ft, this most notably to be seen at Brunton turret 26b.
This stone wall was not continued beyond the River Irthing (beyond Gilsland) and in its place a Turf wall was substituted the Forts and turrets being constructed of wood. Some of these were replaced with stone a few years later.
*1 Richard Devine The Northwest Frontier of the Roman Empire. Chap 9 Pg. 147
*2 Horsley
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