Such is the mysterious personage who, unknown and abandoned to the obscurity of a prison during the latter part of his existence, became, a few years after his death, celebrated throughout the entire world, and the romantic and piquant remembrance of whom has, for more than a century, charmed the imagination of all, attracted universal attention, and exercised uselessly the patience and sagacity of so many minds. Become the hero of the most famous of legends, he has had the rare privilege of everywhere exciting the curiosity of the public, without ever either wearying or satiating it. At all epochs and among all classes, in England, Germany, Italy, as well as France, in our own days, as in the time of Voltaire, people have manifested the utmost anxiety to penetrate the secret of this long imprisonment. Napoleon I. greatly regretted not being able to satisfy this desire.[3] Louis Philippe, too, discussed this problem, the solution of which he acknowledged himself ignorant of;[4] and, if other sovereigns[5] have pretended they were acquainted with it, their contradictory statements lead us to believe that they were no better informed, but that in their eyes the knowledge and transmission of the dark secret ought to be counted among the prerogatives of the crown. In the long list of writers whom the Man with the Iron Mask, the sphinx of our history, has attracted and tempted, are many illustrious names, as well as some less known now-a-days. During thirty years, Voltaire, Fréron, Saint-Foix, Lagrange-Chancel, and Father Griffet took part in a brilliant joust, in which each of the adversaries succeeded a great deal better in overthrowing his opponent’s opinions than in securing the triumph of his own. Many times, and in our own days even, has the debate been resumed, then momentarily abandoned, then recommenced again. Far and near new theories have been broached, invariably supported by vague and weak proofs, and soon overthrown by strong and valid objections. Fifty-two writers[6] have by turns endeavoured to throw light upon this question, but without success; and it can be affirmed that a century of controversy and of exertion has not yet dissipated the mysterious gloom in which Saint-Mars’ celebrated prisoner is enveloped. So many successive checks, by still further stimulating curiosity, have caused it to be believed that it was impossible to arrive at an incontestable and definitive result. Every new explanation having been victoriously repelled almost as soon as started, people have despaired of ever attaining the truth, and some have even gone so far as to proclaim it as being beyond human reach. “The story of the Iron Mask,” says M. Michelet,[7] “will probably for ever remain obscure,” “The Man with the Iron Mask will very likely always be an insoluble problem,” has been said elsewhere;[8] and M. Henri Martin declares that “history has not the right of pronouncing an opinion on what will never emerge from the domain of conjecture.”[9]