 The letter explained that any lady young or old "de noble lignée" ("of noble lineage") finding herself the victim of injustice could petition one or more or the knights "de l'Écu Vert à la Dame Blanche" for redress and that knight would respond promptly and leave whatever other task he was performing to fight the lady's oppressor personally.The thirteen knights promised not just this, however.They offered also to release any other knight from a vow requiring him to fight a duel before a judge.