"As a friar Peckham was naturally inclined to favour the pretensions of the papal see, and his tenure of office was marked by several bold though ineffectual attempts to magnify ecclesiastical authority at the expense of the temporal power. Almost his first act on landing [in England as the new Archbishop] was to summon a council to meet at Reading on 29 July [1279]. Among other acts at this council Peckham ordered his clergy to explain the sentences of excommunication against the impugners of Magna Charta, against those who obtained royal writs to obstruct ecclesiastical suits, and against all, whether royal officers or not, who neglected to carry out the sentences of the royal courts. Edward took offence at Peckham's attitude and... not only compelled him to withdraw the objectionable articles, but also made the archbishop's action the occasion for passing Statute of Mortmain or De Religiosis."