Gesner's free use of cross-references shows how carefully he planned his book. For example, he reminds the reader that miscellanies dealing with such natural objects as metals, stones, animals, and plants will be found in the book entitled _Physica_,[27] those concerned with the words and deeds of famous men will be found in Caelius Rhodiginus,[28] and epistolographers, who may be thought of as authors of books of a miscellaneous character, will be found in a later section.[29] In a subdivision indicated by a paragraph sign but without a centerhead Gesner says that dictionaries contain miscellaneous information, cites examples, and adds a cross-reference to his discussion of dictionaries. As is evident, he has covered the sources of miscellaneous information rather fully. In a second division of this part Gesner names writers who have written comments on several authors and have printed them in a single volume. He cites eleven examples, beginning with Bassianus Landus (Bassiano Landi, d. 1562), _Epiphyllides_[30] and including the manuscript notes of his contemporary, the Neapolitan grammarian, L. J. Scoppa. Since the _Epiphyllides_ does not seem to have been printed and a contemporary scholar's manuscript notes are obviously difficult to find, Gesner can be said to have taken great pains with the list. He excludes those who have written one or more volumes of commentary on a single author. In Pars ii, _De indicibus librorum_, an extremely interesting discussion of indexes with rather little bibliographical baggage, Gesner differentiates and discusses several varieties and brings his discussion of methods to a close with some remarks about page numbers and chapter numbers.[31] A paragraph sign sets off a list of indexes to various books, chiefly editions of the classics and Biblical or patristic writings. This list would have been very useful to H. B. Wheatley in writing _What is an Index?_ (London, 1879). On the next page (fols. 21^a-21^b) Gesner names a few publishers' catalogues and, after a paragraph sign, a few library catalogues.[32] Pars ii ends with a long discussion of the ways of cataloguing books (fols. 21^b-22^b). Pars iii, _Problemata, Quaestiones & Disputationes_, is a strictly bibliographical account of special varieties of miscellanies.[33] The next two Partes contain a discussion of the methodology of note-taking and are not directly bibliographical in nature. Pars vi lists some forty collections of commonplaces (fols. 27^b-28^a). Among them are Antonius Corvinus's arrangement of Erasmus's _Apophthegmata_ in commonplaces,[34] Stobaeus, Thomas Hibernicus,[35] Maximus Planudes (who expurgated and arranged the Greek Anthology in _loci communes_), Otto Brunfels (whose _Pandectae sacrae_[36] Gesner has used freely), and Valerius Maximus. Such books were more or less like general reference works. Here, as elsewhere, Gesner names classical and contemporary writers in a single list.