The four bibliographies of bibliographies published in the eighty years between Gesner's _Pandectae_ (1548) and Sweert's _Athenae Belgicae_ (1628) are, as their authors intended them to be, relatively complete. In _The Beginnings of Systematic Bibliography_, Theodore Besterman adds only a few rather unimportant titles and these may indeed not have seemed to be bibliographies or to have deserved mention in the eyes of Gesner and his successors. Instructive technical developments are evident in these first four compilations. Gesner cites both classical Greek and Latin works and contemporary bibliographies. Spach, Bolduan, and Sweerts adopt the modern practice of preferring to list bibliographies of contemporary usefulness. Gesner, Spach, and Bolduan do not separate their work from the larger task of writing a general subject index. Sweerts sees that the bibliography of bibliographies can be an independent enterprise. Gesner, Spach, and Bolduan offer alphabetical lists. Sweerts adopts the modern plan of a classified list. Although the bibliography of bibliographies has continued to be a necessary part of a general subject index, I shall limit myself in the following discussion to bibliographies of bibliographies that have been published as separate works. FOOTNOTES: [1] St. Jerome has in mind the _De illustribus grammaticis_ and _De rhetoribus_ by Suetonius. For a discussion of Latin writers of biobibliography see Wilhelm Ludwig Schmidt, _De Romanorum imprimis Suetonii arte biographica_ (Diss.; Marburg, 1891). [2] Hermippus of Smyrna wrote on legislators, the Seven Sages, and the pupils of Isocrates. He or another Hermippus wrote a _De viris illustribus_, which is probably the book intended by St. Jerome. For more information about Hermippus and the other writers mentioned in this passage see Joannes Jonsius, _De scriptoribus historiae philosophiae_ (Frankfurt a.M., 1659) and such a modern authority as Wilhelm von Christ, _Geschichte der griechischen Literatur_ (6th ed., Munich, 1920). I recommend Jonsius because he makes clear the bibliographical aspect of these writers. There is no adequate account of classical Greek and Latin bibliographical writings. [3] Antigonus, who is often cited by Diogenes Laertius in his biobibliography of philosophers, wrote a general biobibliography that is now lost. [4] Satyrus wrote a _De viris illustribus_ in dialogue that may have been Plutarch's model. [5] The polymath Aristoxenus is credited with a book on the writers of tragedy. This may be the book intended here. Plutarch admired his biographical dictionary. See Jonsius, pp. 73-78. [6] Pliny (_Natural History_, 35.2) cites Varro's _De imaginibus_ which contained five hundred or more _imagines_ or characterizations, probably with illustrations. Varro also wrote accounts of poets, rhetoricians, and libraries. [7] Like the following authors, Santra wrote a biobibliographical dictionary.