Louis, chosen as arbiter by both sides, delivered solemnly, on the 23d of January, 1264, a decision which was favorable to the English kingship, but at the same, time expressly upheld the Great Charter and the traditional liberties of England.

He concluded his decision with the following suggestions of amnesty: "We will also that the King of England and his barons do forgive one another mutually, that they do forget all the resentments that may exist between them; by consequence of the matters submitted to our arbitration, and that henceforth they do refrain reciprocally from an offence and injury on account of the same matters." But when men have had their ideas, passions, and interests profoundly agitated and made to clash, the wisest decisions and the most honest counsels in the world are not sufficient to re-establish peace; the cup of experience has to be drunk to the dregs; and the parties are not resigned to peace until on or the other, or both, have exhausted themselves in the struggle and perceive the absolute necessity of accepting either defeat compromise.
In spite of the arbitration of the King of France the civil war continued in England; but Louis did not seek any way to profit by it so as to extend, at the expense of his neighbors, his own possessions or power; he held himself also from their quarrels, and followed up by honest neutrality ineffectual arbitration.

Five centuries afterwards the great English historian, Hume, rendered him due homage in these terms: "Every time this virtuous prince interfered in the affairs of England, it was invariably with the view of settling differences between the king and the nobility.

Adopting an admirable course of conduct, as politic probably as it certainly was just, he never interposed his good offices save to put an end the disagreements of the English; he seconded all the measures which could give security to both parties, and he made persistent efforts, though without success, to moderate the fiery ambition of the Earl of Leicester." (Hume, _History of England,_ t.ii.

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