He wrote _Censura Patrum_ (London, 1623. 4^o; 1614. 8^o), but it ought to be utterly rejected, along with Rivet's _Criticus_, Scultetus's _Medulla_, the outburst of Hottinger, and similar commentaries of the most virulent heretics, by all holding the Catholic faith or it ought to be put far away in the castle of Hell, whence it is forbidden to depart, along with the Magdeburg Centuriators, Mathias Flaccius Illyricus, and the works of others that have been assembled in several volumes. I hear also that a criticism of ancient writers by the same Cooke was published at Helmstadt in octavo in 1655. Labbé makes mistakes in details and perhaps more mistakes than a modern bibliographer. We can easily pardon minor troublesome mistakes in alphabetization. In an index according to Christian names it is not fatal to have the last name of Christophorus Ferg misspelled Freg.[65] Labbé should have eliminated many duplications like those of Christophorus Giarda and Christophorus a Giarda or Philibertus Fezaius and Philibertus Fresalius (the latter is an error). A comparison of Labbé's text with the indexes discloses serious discrepancies that reduce the value of his book. One can usually go from the indexes to the text without much trouble, although a few references lack the name needed as a guide.[66] A reverse comparison of the text with the indexes is much less satisfactory and shows that Labbé added names to the text after he had made the indexes.[67] We can justly object to Labbé's inclusion of subject entries in an alphabet of authors.[68] Had he given more thought to them, he would no doubt have hit upon the idea of a dictionary catalogue of authors and subjects and might have simplified the complicated indexes. His plan required him to put subjects into the indexes, but he had no good place to put an article "Bibliothecae." This contains a classified list of catalogues and libraries that I shall discuss in the next chapter. He put it in its alphabetical place, in a list of names. A curious bibliography of fictitious bibliographies is entered under "Fictae Bibliothecae." When Labbé put a bibliography of guides to university studies at the end of his alphabet of authors, he showed his realization of the fact that he had no place for it.