"Grant, of special grace, to John Norys, esquire, of power to enclose 600 acres of land and wood of his demense lands and woods in Yattingden, Wele and Firmisham and to make a park and warren of them and with stone, sand and mortar (calce) to fortify his manor there with turrets, battlements and machiolations and to hold the said manor, park and warren to him and his heirs for ever."
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.
Please let me know if you see any errors, can add information or can otherwise help to improve this resource. Contact me