Some nice detail of the Roman fort at Birrens (Blatobulgium in the Antonine Itinerary) with the internal layout, 6 defensive ditches to the N. & annexe earthworks to the W. all quite clear. A Hadrianic auxiliary fort of the 120's, rebuilt in 142 AD & 158 AD & abandoned c.184 AD
Some additional images with contrast and color shading to highlight features
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