The king's assumed right to the territories thus disposed of arose partly from the conquests of his father, and partly from Amauri, who a few days later executed a third cession of all his claims without reserve or consideration, other than what the king in his bounty might see fit to grant. The reward he obtained was the reversion of the dignity of Constable of France, which fell in the next year on the death of Matthieu de Montmorency. In 1237 he foolishly revived his claims, again styled himself Duke of Narbonne, made an unsuccessful effort to seize Dauphiné in right of his wife, and invaded the county of Melgueil, thereby incurring the wrath of Gregory IX., who ordered him as a penance to join the crusade then preparing to start for the Holy Land. In effect he did so, and Gregory generously granted him, to be paid after he was beyond seas, the large sum of three thousand marks out of the fund arising from the redemption of their vows by Crusaders staying at home--by this time a customary mode of selling indulgences, and one exceedingly lucrative, for this payment was assigned simply on the province of Sens and the lands of Amauri himself. In 1238 he sailed, and his customary ill-luck pursued him, for in 1241 we hear of him as a prisoner of the Saracens, and Gregory again came to his aid by contributing to his ransom four thousand marks from the same redemption fund. His death occurred the same year at Otranto, on his return from Palestine, thus closing a life of strange vicissitudes and almost uninterrupted misfortune.[182] * * * * *