Eco, Umberto. The Name of the Rose (San Diego: Harcourt Brace Jovanovich, c1983) 502 p. A Helen and Kurt Wolff book. Originally published as Il nome della rosa (Fabbri-Bompiani, c1980) Translated from the Italian by William Weaver.

A murder is committed in a medieval monastery library.

The library was laid out on a plan which has remained obscure to all over the centuries, and which none of the monks is called upon to know. Only the librarian has received the secret, from the librarian who preceded him, and he communicates it, while still alive, to the assistant librarian, so that death will not take him by surprise and rob the community of that knowledge. And the secret seals the lips of both men. Only the librarian has, in addition to that knowledge, the right to move through the labyrinth of the books, he alone knows where to find them and where to replace them, he alone is responsible for their safekeeping. The other monks work in the scriptorium and may know the list of the volumes that the library houses. But a list of titles often tells very little; only the librarian knows, from the collocation of the volume, from its degree of inaccessibility, what secrets, what truths or falsehoods, the volume contains. Only he decides how, when, and whether to give it to the monk who requests it .... (p. 37).

The librarian is Malachi of Hildesheim. When he shows visitors the list of volumes the following ensues:

"But in what order are they listed?" He quoted from a text I did not know but which was certainly familiar to Malachi: "'The librarian must have a list of all books, carefully ordered by subjects and authors, and they must be classified on the shelves with numerical indications.' How do you know the collocation of each book?"

Malachi showed him some annotations beside each title. I read: "iii, IV gradus, V in prima graecorum"; "ii, V gradus, VII in tertia anglorum," and so on. I understood that the first number indicated the position of the book on the shelf or gradus, which was in turn indicated by the second number, while the case was indicated by the third number; and I understood also that the other phrases designated a room or a corridor of the library, and I made bold to ask further information about these last distinctions. Malachi looked at me sternly: "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."

"But in what order are the books recorded in this list?" William asked. "Not by subject, it seems to me." He did not suggest an order by author, following the same sequence as the letters of the alphabet, for this is a system I have seen adopted only in recent years, and at that time it was rarely used.

"The library dates back to the earliest times," Malachi said, "and the books are registered in order of their acquisition, donation, or entrance within our walls."

"They are difficult to find, then," William observed.

"It is enough for the librarian to know them by heart and know when each book came here. As for the other monks, they can rely on his memory." (p. 75).

The assistant librarian is Berengar of Arundel, "a pale-faced young man" (p. 82).