( 1a) General reference
BM Royal Mss tract addressed to Lord Burghley, AD 1590
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( 1) General reference
Hist and Antiqs. Roxburgh 4 1864 facsimile of map p 232 (A Jeffrey)
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(2) Denis R Perriam and John Robinson 1998 The medieval fortified buildings of Cumbria : an illustrated gazetteer and research guide
Cumberland and Westmorland Antiquarian and Archaeological Society extra series vol.29 Page(s)81
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