( 1) Ordnance Survey Map (Scale / Date)
OS 6" 1915
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( 2) General reference
T Lancs & Ches HS 104 1952 145-52 plan (T G E Powell)
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( 3) Field Investigators Comments
F1 FDC 24-FEB-59
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( 4) General reference
BAR 20 pt 2 1975 - Later Prehist from Trent to Tyne 48 (A J Challis & D W Harding)
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(5) General reference
English Heritage Scheduling Amendment 12/12/95
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