Granted at Hereford.

Original source is;

• Lyte, H.C. Maxwell (ed), 1893 (reprint 1971), Calendar of Patent Rolls (1281-92) p. 450 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. 439n85
  Turner, T.H. and Parker, J.H., 1859, Some account of Domestic Architecture in England (Oxford) Vol. 3 part 2 p. 403 online copy

Henry Summerson, ‘Ludlow , Lawrence of (d. 1294)

Biographical source include;

• Henry Summerson, 2004, ‘Ludlow , Lawrence of (d. 1294)’ Oxford Dictionary of National Biography (Oxford University Press) online copy (subscription may be needed)