In 1348 Feb 22, Johannes de Grey de Retherfeld (Sir John Grey of Rotherfield) was granted, by Edward III, (In year 22 of his reign) a Confirmation licence to crenellate Sculcotes (Sculcoates)

"Licence for John de Grey of Retherfeld to crenellate his dwelling-places (mansum) of Retherfeld, co. Oxford, and Sculcotes, co. York."

Granted at Westminster, by privy seal.

Licensed with Rotherfield Greys Court, Oxfordshire. The same licence was granted in 1346 at Calais. There is no suggestions as to the reason for this repeat unless to get an issue under Privy Seal?

Original source is

• Calendar of Patent Rolls (1348-50) p36

(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 p389n16
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol3 pt2 p415

More details about licences to crenellate can be found here.

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