Granted at York. Grant by King, on the information of Thomas de Cherleton.

Original source is;

• Lyte, H.C. Maxwell (ed), 1903, Calendar of Patent Rolls (1317-21) p. 224 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;

• King, D.J.C., 1983, Castellarium Anglicanum (London: Kraus) Vol. 2 p. 312n7
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol. 3 part 2 p. 407 online copy

Edmund Bacon (d. 1336/7)

Biographical source include;

• Paul Brand, 2004, ‘Bacon , John (c.1250–c.1323)’ Oxford Dictionary of National Biography (Oxford University Press) online copy (subscription may be needed)