This manuscript, in its original state, has never been printed. Herr Brockhaus, on obtaining possession of the manuscript, had it translated into German by Wilhelm Schuetz, but with many omissions and alterations, and published this translation, volume by volume, from 1822 to 1828, under the title, _Aus den Memoiren des Venetianers Jacob Casanova de Seingalt_. While the German edition was in course of publication, Herr Brockhaus employed a certain Jean Laforgue, a professor of the French language at Dresden, to revise the original manuscript, correcting Casanova's vigorous, but at times incorrect, and often somewhat Italian, French according to his own notions of elegant writing, suppressing passages which seemed too free-spoken from the point of view of morals and of politics, and altering the names of some of the persons referred to, or replacing those names by initials. This revised text was published in twelve volumes, the first two in 1826, the third and fourth in 1828, the fifth to the eighth in 1832, and the ninth to the twelfth in 1837; the first four bearing the imprint of Brockhaus at Leipzig and Ponthieu et Cie at Paris; the next four the imprint of Heideloff et Campe at Paris; and the last four nothing but _A Bruxelles_. The volumes are all uniform, and were all really printed for the firm of Brockhaus. This, however far from representing the real text, is the only authoritative edition, and my references throughout this article will always be to this edition. In turning over the manuscript at Leipzig, I read some of the suppressed passages, and regretted their suppression; but Herr Brockhaus, the present head of the firm, assured me that they are not really very considerable in number. The damage, however, to the vivacity of the whole narrative, by the persistent alterations of M. Laforgue, is incalculable. I compared many passages, and found scarcely three consecutive sentences untouched. Herr Brockhaus (whose courtesy I cannot sufficiently acknowledge) was kind enough to have a passage copied out for me, which I afterwards read over, and checked word by word. In this passage Casanova says, for instance: _Elle venoit presque tous les jours lui faire une belle visite._ This is altered into: _Cependant chaque jour Therese venait lui faire une visite._ Casanova says that some one _avoit, comme de raison, forme le projet d'allier Dieu avec le diable_. This is made to read: _Qui, comme de raison, avait saintement forme le projet d'allier les interets du ciel aux oeuvres de ce monde._ Casanova tell us that Therese would not commit a mortal sin _pour devenir reine du monde_: _pour une couronne_, corrects the indefatigable Laforgue. _Il ne savoit que lui dire_ becomes _Dans cet etat de perplexite_; and so forth. It must, therefore, be realised that the _Memoirs_, as we have them, are only a kind of pale tracing of the vivid colours of the original.