( 1) General reference
OS 1:2500 1959
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( 2) General reference
T Lancs & Ches AS 70 1960 66-73 illust (JD Bu'Lock, CEP Rosser & GW Dimbleby)
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( 3) Field Investigators Comments
F1 FDC 15-MAY-58
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( 4) Field Investigators Comments
F2 ISS 12-FEB-76
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(5) General reference
English Heritage Scheduling Amendment 20/8/94
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