"Licence for Roger de Sumery and his heirs to enclose the dwelling-place of his manor (mansum manerii sui) of Duddeleg, co. Stafford, and of Welegh, co. Worcester, with a ditch and a wall of stone and lime, and to fortify and crenellate it."
Granted at Oxford,
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. Licentia is best translated as 'freedom to' not 'permission'.)
Significant later source are;
Roger de Somery (1208-1273) Roger was a royalist during the Baron's War. In 1266 he was one of the authors of the Dictum of Kenilworth, which ended the Baron's War. Dudley had been 'demolished' in 1175 by Henry II because of the rebellion of Gervase Paganel. The de Someri's gained the castle through marriage to his daughter and heiress. Some of the rebuilding work may date to this time but the castle would have been a reasonable powerful stronghold anyway.
More details about licences to crenellate can be found here.
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