In 1686 Antoine Teissier (1632-1715), a Frenchman who became historiographer at the court of Frederick I of Prussia, published a revised and enlarged edition of Labbé's _Bibliotheca bibliothecarum_ and gave it a new title: _Catalogus auctorum, qui librorum catalogos, indices, bibliothecas, virorum literatorum elogia, vitas, aut orationes funebres, scriptis consignarunt_. This new title, which he signs "By Antoine Teissier (Ab Antonio Teisserio)," obscures the fact that the _Catalogus_ is essentially a new edition of Labbé's bibliography. The title page gives credit to Labbé only for an appendix entitled _Bibliotheca nummaria_. Teissier could, to be sure, claim that his emphasis on eulogies, biographies, and funeral orations representing a category of biographical writings that Labbé had not included amounted to a sufficiently large alteration to justify a claim to authorship. We can at least say that he did not treat his predecessor generously. In a preface addressed to the reader he says that he has doubled the number of bibliographies cited and has added twelve hundred biographical works.[82] He has made the _Catalogus_ both an index to biographies and a bibliography of bibliographies. He could scarcely have added the biographies if he had fully perceived the nature and usefulness of a bibliography of bibliographies. Teissier was a diligent collector and a good organizer. Although he has corrected errors and has filled in gaps in the _Bibliotheca bibliothecarum_, he was not always as careful as he should have been. He added two new indexes: Index V (_Catalogus_, pp. 353-355), listing writers of biobibliographies of miscellaneous scope (i.e., works that were not restricted to men of a particular country or profession), and Index X (_Catalogus_, pp. 364-400), listing the men who were the subjects of biographies. These indexes show that Teissier was chiefly interested in biography. He transferred an index of last names that Labbé had given in the preliminary pages to the end of the Catalogus and made it Index XI. He showed bibliographical sense in perceiving and remedying the serious difficulties that the references to "Anonymus" in Labbé's indexes had caused. In order to run them down in the _Bibliotheca bibliothecarum_ one must read the entire book. Teissier assembled all anonymous works in a single place ("Auctores anonymi," pp. 319-332) and thus made it possible to identify a reference rather easily. He removed the brief account of fictitious libraries to a new place (_Catalogus_, p. 363) and added to it a short but very interesting list of sixteen seventeenth-century catalogues of private libraries.