An authentic account of the conduct of the Young Chevalier : From his first arrival in Paris, after his defeat at Culloden, to the conclusion of the peace at Aix-la-Chapelle. Wherein the motives of his late behaviour are fully laid open and explained; with the various messages which passed between him and the French King; and many other curious and intersting particulars. Never before made public. In a letter from a gentleman residing at Paris, to his friend in London.