(8) Vertical aerial photograph reference number
NMR RAF/542/93 F21 0030 06-DEC-1954
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( 1) General reference
Ordnance Survey 6" 1958
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( 2) General reference
Elgee F and HW 1933 Archaeology of Yorkshire p 232
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( 3) General reference
Hayes RH 1963 History of Helmsley Rievaulx and District p 419
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( 4) Field Investigators Comments
I S Sainsbury 06/01/1976 Ordnance Survey Archaeology Division Field Investigator
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(6) General reference
English Heritage SAM List North Yorkshire March 1994 p46
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(7) General reference
English Heritage Schedule Entry 03/01/1997
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