From Avignon Louis marched westward, everywhere receiving the submission of nobles and cities until within a few leagues of Toulouse. The reduction of that obstinate focus of heresy was apparently all that remained to complete the ruin of Raymond and the success of the crusade, when Louis suddenly turned his face homeward. No explanation of this unlooked-for termination of the campaign is furnished by any of the chroniclers, but it is probably to be sought in the sickness which pursued the Crusaders, and possibly in the commencement of the disease which terminated the march and the life of the king at Montpensier on November 8--fulfilling the prophecy of Merlin, "In ventris monte morietur leo pacificus"--and not without suspicion of poisoning by Thibaut of Champagne. Throughout Europe, however, the retreat was regarded as the result of serious military reverses. Louis had designed to return the following year, and had left garrisons in the places which had submitted to him, with Humbert de Beaujeu, a renowned captain, in supreme command, and Gui de Montfort under him, but their feats of arms were few, though the burning of heretics was not neglected, when occasion offered, if only to maintain the sacred character of the war.[178]
Saved as by a miracle from the ruin which had seemed inevitable, Raymond lost no time in recovering a portion of his dominions. The death of Louis had worked a complete revolution in the situation, and, for a time at least, he had little to fear. It is true that Louis IX., a child of thirteen, was crowned without delay at Reims, and the regency was confided to his mother, Blanche of Castile, but the great barons were restive, and the conspiracy, hatched before the walls of Avignon, was yet in existence. Britanny, Champagne, and La Marche ostentatiously kept away from the coronation, delayed offering their homage, and intrigued with England. Early in 1227, however, they quarrelled, when a show of force and favorable terms brought them in one by one; short truces were made with Henry III. and the Viscount of Thouars, and a temporary respite was obtained. Gregory IX., who mounted the papal throne March 19, 1227, took the regent and the boy-king under the papal protection, on the ground of their being engaged in war against heresy; but the succors which they sent from time to time to de Beaujeu were probably only enough to give color to a continuance of the ecclesiastical tithe, which the four great provinces of Reims, Rouen, Sens, and Tours resisted till the legate authorized the regent to seize church property and compel the payment. Raymond thus was enabled to continue the struggle with varying fortune. The Council of Narbonne, held during Lent, 1227, in excommunicating those who had proved faithless to the oaths given to Louis shows that the people had returned to their ancient allegiance where they safely could; and in commanding a strict perquisition of heretics by the bishops and their punishment by the secular authorities, it indicates that even in territories held by the French the duties of persecution were slackly performed.[179]