(1) General reference
Everson, P 1982 Unpublished archive text, West Lindsey Project, RCHME
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(1a) General reference
Croune, H A and Davis, R H C eds 1968 Regesta Regum Anglo-Normanorum vol III 39-40, 243, 316 Oxford
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(1b) by Derek Renn 1973 Norman castles in Britain
Page(s)353
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(1c) by David J Cathcart King 1983 Castellarium anglicanum : an index and bibliography of the castles in England, Wales and the islands. Volume I : Anglesey - Montgomery
Page(s)264
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