Library catalogue rule

The Library catalogue rule is the central administrative and epistemological principle governing the abbey's vast collection of books, a system deliberately designed to be opaque to all but the librarian and his assistant, thereby enforcing the library's secrecy and the abbot's control over knowledge. The rule dictates that the catalogue is not a transparent finding aid but a tool of power, its logic known only to the initiated, making the library a labyrinth not only of rooms but of records.

Structure and Purpose of the Catalogue

The catalogue is a voluminous codex, fixed by a little gold chain to the librarian's desk in the scriptorium, containing very thickly written lists of the library's holdings. When William of Baskerville asks to consult it, Malachi of Hildesheim, the librarian, shows him this book. The catalogue records titles, but the crucial information for locating a book—its collocation—is encoded in a system of annotations that only the librarian can decipher. For example, beside a title, one might find notations such as "iii, IV gradus, V in prima graecorum" or "ii, V gradus, VII in tertia anglorum." The first number indicates the position of the book on a shelf or gradus, the second number indicates the shelf itself, and the third number indicates the case. The remaining phrases designate a room or corridor of the library. When Adso asks for further information about these distinctions, Malachi rebukes him, stating, "Perhaps you do not know, or have forgotten, that only the librarian is allowed access to the library. It is therefore right and sufficient that only the librarian know how to decipher these things."

Order of Registration and Access

The books are not recorded by subject or author in an alphabetical sequence, a system that was rarely used at the time. Instead, the library dates back to the earliest times, and the books are registered in the order of their acquisition, donation, or entrance within the abbey's walls. This makes them difficult to find for anyone not intimately familiar with the collection's history. Malachi explains that it is enough for the librarian to know them by heart and know when each book came here. The other monks must rely on his memory. The librarian's office is thus a living repository of knowledge, passed down from one holder to the next. When William asks if he could seek something on the pentagon of Solomon, Malachi replies that he could identify its location on the floor above, but before giving him that book, he would prefer to ask the abbot's advice. This demonstrates that the catalogue rule is not merely a finding aid but a gatekeeping mechanism, where the librarian, in consultation with the abbot, decides which knowledge is appropriate for which reader.

The Catalogue as a Tool of Control

The catalogue rule is a direct expression of the abbey's philosophy of knowledge, as articulated by Abbot Abo. The abbot explains that the library was laid out on a plan that has remained obscure to all over the centuries, and only the librarian has received the secret from his predecessor. The secret seals the lips of both men. Only the librarian knows, from the collocation of the volume and its degree of inaccessibility, what secrets, truths, or falsehoods the volume contains. He alone decides how, when, and whether to give it to the monk who requests it, sometimes first consulting the abbot. This is because, as the abbot states, "not all truths are for all ears, not all falsehoods can be recognized as such by a pious soul." The catalogue rule, therefore, is the practical instrument of this policy, ensuring that the library's treasures are protected not only against mankind but also against nature, and that the monks are guided in their reading according to the dictates of authority rather than personal curiosity. The system is a terrestrial and spiritual labyrinth, designed to be navigable only by its appointed guardians.