Archbishop Langton, who on assuming possession of his see had shown at once that he was a patriotic English statesman, and not the mere delegate of the pope, besought his master to hold back, and, when he refused, threatened to renew the excommunication which had so lately been removed. The old justiciar Geoffrey Fitz-Peter, now on his death-bed, had also refused to pronounce sentence on the defaulters. John hesitated, and meanwhile his enemies began to organize their resistance. Opposition of the barons. A great landmark in the constitutional history of England was reached when Langton assembled the leading barons, rehearsed to them the charter issued by Henry I. on his accession, and pointed out to them the rights and liberties therein promised by the crown to the nation. For the future they agreed to take this document as their programme of demands. It was the first of the many occasions in English history when the demand for reform took the shape of a reference back to old precedents, and now (as on all subsequent occasions) the party which opposed the crown read back into the ancient grants which they quoted a good deal more than had been actually conceded in them. To Langton and the barons the charter of Henry I. seemed to cover all the customs and practices which had grown up under the rule of the bureaucracy which had served Henry II. and Richard I. A correct historical perspective could hardly be expected from men whose constitutional knowledge only ran back as far as the memory of themselves and their fathers. The Great Charter of 1215 was a commentary on, rather than a reproduction of, the old accession pledges of Henry I. Alliance against France. Battle of Bouvines.