Pope proposed to enfeoff Charles with the kingdom. Charles sought instructions from Louis IX, who forbade him to accept the offer, because he regarded Conrad as the lawful ruler. After Charles informed the Holy See on 30October 1253 that he would not accept the Regno, the Pope offered it to Edmund of Lancaster. Queen Blanche, who had administered France during Louis' crusade, died on 1December 1252. Louis made Alphonse and Charles co-regents, so that he could remain in the Holy Land. Margaret II, Countess of Flanders and Hainaut had come into conflict with her son by her first marriage, John of Avesnes. After her sons by her second marriage were captured in July 1253, she needed foreign assistance to secure their release. Ignoring Louis IX's 1246 ruling that Hainaut should pass to John, she promised the county to Charles. He accepted the offer and invaded Hainaut, forcing most local noblemen to swear fealty to him. After his return to France, Louis IX insisted that his ruling was to be respected. In November 1255 he ordered Charles to restore Hainaut to Margaret, but her sons were obliged to swear fealty to Charles. Louis also ruled that she was to pay 160,000 marks to Charles over the following 13 years. Charles returned to Provence, which had again become restive. His mother-in-law continued to support the rebellious Boniface of Castellane and his allies, but Louis IX persuaded her to return Forcalquier to Charles and relinquish her claims for a lump sum payment from Charles and a pension from Louis in November 1256. A coup by Charles's supporters in Marseilles resulted in the surrender of all political powers there to his officials. Charles continued to expand his power along the borders of Provence in the next four years. He received territories in the Lower Alps from the Dauphin of Vienne. Raymond I of Baux, Count of Orange, ceded the title of regent of the Kingdom of Arles to him. The burghers of Cuneoa town strategically located on the routes from Provence to Lombardysought Charles's protection against Asti in July 1259. Alba, Cherasco, Savigliano and other nearby towns acknowledged his rule. The rulers of Mondovì, Ceva, Biandrate and Saluzzo did homage to him. Emperor Frederick II's illegitimate son, Manfred, had been crowned king of Sicily in 1258. After the English barons had announced that they opposed a war against Manfred, Pope Alexander IV annulled the