As will have been seen from the above census, statute books often included with their copies of Magna Carta, the  sentence of 1253 pronounced by the bishops against violators of the Charter.  This was clearly considered a very important step in the establishment of the Charter. For a remarkable collection of texts in which the sentence appears, see Julia Barrow's census in English Episcopal Acta 35: Hereford 1234-1275, ed J. Barrow (Oxford, 2009), 43-5.