In 1201 March 2, Henry fitz Hervey (Henry son of Hervey son of Acaris) was granted, by John, (In year 2 of his reign) a Royal licence to crenellate Cudereston (Cotherstone Castle)

Granted at York,

Original source is

• Hardy, T.D. (ed.), 1837, Rotuli Chartarum in Turri Londinensi asservati 1199-1216 (Record Commission) p89b

(In fact, the original source given is usually a transcription/translation of what are precious medieval documents not readily availably. It should be noted that these transcription/translations often date to the nineteenth or early twentieth centuries and that unwitting bias of transcribers may affect the translation. Care should also be taken to avoid giving modern meaning to the medieval use of certain stock words and terms.)

Significant later source are;

• Butler, Lawrence, 1992, 'The Origins of the Honour of Richmond and its Castles' Chateau-Gallard Vol16 p69-80 [Reprinted in Liddiard, Robert, (ed), 2003, Anglo-Norman Castles (Woodbridge: Boydell Press)]
  King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol2 p536n21

Henry Fitz Hervey (1165-1216)

Henry Fitz Hervey, Lord of Ravensworth b c. 1165, of Ravensworth, Yorkshire, England, d aft 1216. He md Alice Fitz Wauter c. 1186, daughter of Randolf Fitz Wauter. She was b c. 1170
'took the Cross and accompanied King Richard to Palestine in 1189-92. He entertained King John at Ravensworth Castle in 1201, and with horses and arms joined the English army sent to aid William, King of Scots, in McWilliamís rebellion, 1211.' (http://www.tudorplace.com.ar/FITZHUGH.htm)

More details about licences to crenellate can be found here.

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