"Grant for good service to John Pury, king's squire, that he may crenellate his manor of Chambirehous, co. Berkshire, with stone and mortar, and impark 300 acres of land, 40 acres of wood and 4 acres of meadow; and that he may have free warren in all his demense lands of the said manor; and hold hold all the foregoing to him and his heirs ..."
Granted at Westminster, by privy seal and of the said date etc. {by authority of parliament}.
Pury was an esquire of Henry VI, and in 1446 he obtained licence to inclose the manor of Chamberhouse, to crenellate and embattle it, together with a grant of very considerable privileges in the manor, including the view of frankpledge.
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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