[89] The numbers are actually much larger because I have, for convenience, cited either the _Catalogus_ or the _Auctuarium_ as an illustration and the work that I do not cite gives more references in all these categories, except the last. [90] See _Auctuarium_, p. 297, citing a book by Christian Serpitius. H. B. Wheatley overlooked it in his excellent study, _Of Anagrams_ (London, 1862). [91] For references to these books see Theodore Besterman, _The Beginnings of Systematic Bibliography_ (2d ed.; [Oxford] and London, [1936]) and _A World Bibliography of Bibliographies_ (2d ed.; [Oxford] and London, 1947-1949). [92] For a contemporary reference to the book see Teissier, _Auctuarium_, p. 53. Beughem made the announcement in his _Bibliotheca juridica & politica_ (Amsterdam, 1680), p. [vii]. The subtitle translated above reads in the original: Enarratio ac plenior Enumeratio, omnium Librorum, Operumque quae sub titulo Bibliothecae, Catalogi, Indicis, Anthenarum &c. hactenus typis prodierunt. I have used a copy of the _Bibliotheca juridica_ in my own library. Chapter III Lists of Books Entitled "Bibliotheca" The listing of books that contain the word _Bibliotheca_ in their titles is a special bibliographical development in the seventeenth century and continues into the eighteenth. It might have led by easy stages to making a bibliography of bibliographies, but it unfortunately attracted little notice and maintained a tenuous existence for only about a century. The word _bibliotheca_, which often appears in titles, has such more or less bibliographical meanings as bibliography, subject index, catalogue of a public or private library, and collection of materials dealing with a particular subject. Consequently, a list of books entitled _bibliotheca_ has much in common with a list of reference works and, more particularly, a bibliography of bibliographies. Although there was no proper place for such a list in his _Bibliotheca bibliothecarum_, Philip Labbé included one under the heading _Bibliotheca_ in an alphabet of authors.[93] This is an early example of a list of books chosen according to their titles. Labbé limited himself strictly to works of a bibliographical nature. He did not, for example, include the collections of the church fathers that were very familiar to him, although they bore the title _Bibliotheca_. Many books that he cites are hard to identify: some titles seem to have been made up and others refer to books that were never printed. Labbé uses the term _bibliotheca_ so loosely that we do not always know whether he is referring to a library and its catalogue (for example, _Bibliotheca Augustana_ may mean the library or may be a short title for its catalogue) or a book (for example, Conrad Gesner's _Bibliotheca universalis_). In either case, he is thinking as a bibliographer, and we can easily conceive the enlargement of his list into a bibliography of bibliographies.