( 1) Ordnance Survey Map (Scale / Date)
OS 6" (1st Edition) 1882
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( 2) edited by William Page, F.S.A. 1908 The Victoria history of the county of Hertfordshire, volume two
The Victoria history of the counties of England Page(s)392
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( 3) edited by William Page, F.S.A. 1914 The Victoria history of the county of Hertford, volume four
The Victoria history of the counties of England Page(s)428-32
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( 4) by David Knowles and R Neville Hadcock 1953 Medieval religious houses : England and Wales
Page(s)218
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( 5) General reference
Verulaimium Official Guide (I Anthony 1970)
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( 6) Field Investigators Comments
F1 PAS 10-FEB-71
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(7) by David Knowles and R Neville Hadcock 1971 Medieval religious houses in England and Wales
Page(s)264
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