Petition to the King by the Royal, Military and Religious Order of Nuestra Señora de la Merced requesting the King to declare that His Royal Chamber of the Kingdom of Castille and not His Council, is the organ having jurisdiction to decide whether the privileges of the redemption of captives in the Kingdom of Aragón is vested in the religious order of the Trinitaries or in the religious order of Nuestra Señora de la Merced. [Ca. XVIII century]. [Contains a preliminary speech and several dissertations by Friar Nicolás Cavero].