"Grant, of special grace, to Roger Fenys, knight, that he may enclose, crenellate, and furnish with towers and battlements his manor of Hurst Monceux, co. Sussex, and so hold it to him and his heirs, notwithstanding any statue, act or ordinance to the contrary; and that he may enclose 600 acres of his land adjoining his park there with a paling and dike and hold the park so enlarged to him and his heirs."
Granted at Westminster, by privy seal and of the said date etc. {by authority of parliament}.
Original source is
(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;
More details about licences to crenellate can be found here.
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