"Grant to R. earl of Cornwall, that on the hill above his manor of Mere he may build and fortify a castle of stone and lime, to hold for his life, with reversion to the male issue of him and Senchia his wife, and failing such to the king or his heirs, without claim or hindrance of the heirs of the said earl."
Granted at Portsmouth, by King.
The licence to build was granted to Richard, Earl of Cornwall, the King's brother, in 1253.
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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