( 1) Ordnance Survey Map (Scale / Date)
OS 25" 1963
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( 2) General reference
Raine J. 1852. History of North Durham, 20
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( 3) Field Investigators Comments
F1 DS 09-MAY-67
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(4) Dodds, JF 1999 Bastions and Belligerents: Medieval Strongholds in Northumberland
Page(s)44
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