( 1) Ordnance Survey Map (Scale / Date)
O S 1/2500 1971
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( 2) Council of the Ancient Monuments Society Transactions of the Ancient Monuments Society
(L M Angus-Butterworth) 20 - 1973 Page(s)64-5
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(3) Council of the Ancient Monuments Society Transactions of the Ancient Monuments Society
31 Page(s)134-145
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