The barons, reduced to this desperate extremity, and menaced with the total loss of their liberties, their properties, and their lives, employed a remedy no less desperate; and making applications to the court of France, they offered to acknowledge Louis, the eldest son of Philip, for their sovereign, on condition that he would afford them protection from the violence of their enraged Prince. Though the sense of the common rights of mankind, the only rights that are entirely indefeasible, might have justified them in the deposition of their King, they declined insisting before Philip on a pretension which is commonly so disagreeable to sovereigns and which sounds harshly in their royal ears. They affirmed that John was incapable of succeeding to the crown, by reason of the attainder passed upon him during his brother's reign, though that attainder had been reversed, and Richard had even, by his last will, declared him his successor. They pretended that he was already legally deposed by sentence of the peers of France, on account of the murder of his nephew, though that sentence could not possibly regard anything but his transmarine dominions, which alone he held in vassalage to that crown. On more plausible grounds they affirmed that he had already deposed himself by doing homage to the Pope, changing the nature of his sovereignty, and resigning an independent crown for a fee under a foreign power. And as Blanche of Castile, the wife of Louis, was descended by her mother from Henry II, they maintained, though many other princes stood before her in the order of succession, that they had not shaken off the royal family in choosing her husband for their sovereign. Philip was strongly tempted to lay hold on the rich prize which was offered to him. The legate menaced him with interdicts and excommunications if he invaded the patrimony of St. Peter or attacked a prince who was under the immediate protection of the holy see; but as Philip was assured of the obedience of his own vassals, his principles were changed with the times, and he now undervalued as much all papal censures as he formerly pretended to pay respect to them. His chief scruple was with regard to the fidelity which he might expect from the English barons in their new engagements, and the danger of intrusting his son and heir into the hands of men who might, on any caprice or necessity, make peace with their native sovereign, by sacrificing a pledge of so much value. He therefore exacted from the barons twenty-five hostages of the most noble birth in the kingdom; and having obtained this security, he sent over first a small army to the relief of the confederates; then more numerous forces, which arrived with Louis himself at their head.