In 1293 Feb 22, Robertus de Percy was granted, by Edward I, (In year 21 of his reign) a Royal licence to crenellate Boulton (Bolton Percy)

"Licence for Robert de Percy to crenellate his dwelling-houses (mansum) of Sutton and Boulton, co. York."

Granted at Darley,

Joint licence with Sutton, The entry is on membrane 21 of the rolls dated 22 Feb and on membrane 17 dated 23 Feb.

Original source is

• Calendar of Patent Rolls (1292-1301) p6, 14

(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;

• Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol3 pt2 p404

More details about licences to crenellate can be found here.

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