In 1268 Feb 8, Robertus Aguylum (Robert Aguillon) was granted, by Henry III, (In year 52 of his reign) a Royal licence to crenellate Perting [Percinges] (Perching Manor House)

"Licence for Robert Aguillon and his heirs to enclose the manse of his manor (mansum manerii sui) of Percinges, co. Sussex, with a ditch and a wall of stone and lime and to fortify and crenellate it."

Granted at Westminster,

licensed 1264, 1268, 1329. King writes "Presumably the changes in government of this period give the reason for these extraordinarily cautious operations." Coulson cites the anxieties of the onset, hostilities and aftermath of the Barons' War of 1254-5 as a factor in the 1268 repeat.

Original source is

• Calendar of Patent Rolls (1266-72) p189

(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;

• King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol2 p479n53
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol3 pt2 p403

More details about licences to crenellate can be found here.

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