360 Pages. Complete and Unabridged. From the Preface. Though much has been written about Cagliostro, most of it is confined to articles in encyclopedias and magazines, or to descriptive paragraphs in works dealing with magic, freemasonry and the period in which he lived. This material may be described as a footnote which has been raised to the dignity of a page of history. It is based on contemporary records inspired by envy, hatred and contempt in an age notoriously passionate, revengeful and unscrupulous. It is, moreover, extremely superficial, being merely a repetition of information obtained second-hand by compilers apparently too ignorant or too lazy to make their own investigations. Even M. Funck-Brentano, whose brilliant historical monographs have earned him a deservedly high reputation, is not to be relied upon. In the sequel to his entertaining account of the affair of the Diamond Necklace, the brief chapter he devotes to Cagliostro contains so many inaccuracies as to suggest that, like the majority of his predecessors, he was content to impart his information without previously taking the trouble to examine the sources from which it was derived. It has been said that every book on Cagliostro must be a book against him. With this opinion I totally disagree. In choosing Cagliostro as the subject of an historical memoir I was guided at first, I admit, by the belief that he was the arch-impostor he is popularly supposed to be. With his mystery, magic, and highly sensational career he seemed just the sort of picturesque personality I was in search of.