Granted at Westminster. Grant by privy seal.

Original source is;

• Lyte, H.C. Maxwell (ed), 1900, Calendar of Patent Rolls (1340-43) p. 221 online copy

(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 sources are;

• Emery, Anthony, 1996, Greater Medieval Houses Vol. 1 (Cambridge) p. 159
  King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol. 2 p. 365n31
  Bates, C.J., 1891, Border Holds of Northumberland (London and Newcastle: Andrew Reid) p. 9
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol. 3 part 2 p. 413 online copy

Thomas de Muschamp