In 1330 May 12, Radulphus de Bulmere (Ralph Bulmer) was granted, by Edward III, (In year 4 of his reign) a Royal licence to crenellate Wilton in Clivelande (Wilton Castle, Redcar in Cleveland)

"Licence for Ralph de Bulrnere to crenellate and turrellate his dwelling house (mansum) of Wilton in Cliveland, co. York, and to convert the same into a castle."

Granted at Woodstock, by privy seal.

A licence to crenellate and turrellate and make into a castle.

Original source is

• Calendar of Patent Rolls (1327-30) p519

(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;

• Emery, Anthony, 1996, Greater Medieval Houses Vol1 (Cambridge) p421
  King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol2 p541n137
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol3 pt2 p409

More details about licences to crenellate can be found here.

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