IN giving what follows to the world, no one can be more alive to the fact that this is the latter half of the nineteenth century, and that the present is emphatically the era of the grandest Utilitarianism, Revolution, Matter of Fact, and Doubt that the world ever knew, than is the editor of the following extraordinary tale. He has no apologies to make for offering it-no excuses, even as a novelist, for departing from the beaten track of "War, Love, Murder, and Revenge," "Politics, Passion, and Prussic acid," which constitute the staple of the modern novel.