The Infirmary

The Infirmary, also called Severinus's laboratory and the herbarium, is the abbey's center for medicine, botany, and the preparation of remedies. It is a place of healing that also houses the tools of death, serving as the setting for the murder of its master, Severinus of Sankt Wendel, and the discovery of the forbidden book that drives the novel's central mystery. More than a simple medical facility, it is a repository of both curative and lethal knowledge, a space where the line between medicine and poison is dangerously thin.

Identity and Function

The Infirmary is introduced as the domain of Severinus of Sankt Wendel, the brother herbalist in charge of the balneary, the infirmary, and the gardens. It is a place of practical science, filled with alembics, glass and earthenware instruments, and long shelves lined with cruets, ampoules, and pots containing a vast array of simples. Severinus explains that many substances, rare or impossible to grow in the local climate, have been brought to him by monks from every part of the world. The room is a workshop where Severinus prepares medicines from herbs like valerian, betony, and mandrake, but it also stores deadly poisons, a fact he acknowledges by noting that the line between poison and medicine is very fine, as the Greeks used the word 'pharmacon' for both.

The Poison and the Theft

The Infirmary is the source of the poison used in the murders. Severinus reveals to William that years ago, a brother traveling in distant lands gave him a highly powerful, slimy, yellowish substance that could kill in a short time if it came into contact with the lips. This ampoule was kept in the laboratory until a great storm, during which the room was devastated. Severinus initially believed the ampoule was broken and swept away, but he later realizes it could have been stolen before the storm, with the storm itself used as a cover for the theft. This poison, which leaves black stains on the fingers and tongue of its victims, is the weapon that kills Venantius of Salvemec and Berengar of Arundel, and its presence in the Infirmary implicates the laboratory in the central crime.

The Murder of Severinus and the Disappearance of the Book

The Infirmary becomes the scene of a violent crime when Severinus is murdered. After discovering the stolen book of Aristotle's Poetics in his laboratory, Severinus sends for William, but before he can hand it over, he is killed. The murderer, Malachi of Hildesheim, acting on the orders of Jorge of Burgos, bludgeons Severinus to death with an armillary sphere, a heavy astronomical instrument from the room itself. The laboratory is then ransacked by the cellarer, Remigio of Varagine, who is searching for Dolcino's letters, and the book itself is taken by Benno of Uppsala, who later gives it to Malachi. The room is left in a state of devastation, with pots, bottles, books, and documents scattered in great disorder, a testament to the desperate search for the dangerous text.

Narrative Significance

The Infirmary serves as a crucial nexus for the novel's plot. It is the source of the poison that kills two monks, the hiding place of the forbidden book that motivates the murders, and the site of a key murder itself. The character of Severinus, a man of science and healing, is contrasted with the destructive forces that use his knowledge and his space for murder. The Infirmary embodies the novel's central theme of the dual nature of knowledge, where the same room that holds cures for the body also contains the means to destroy it, and where the pursuit of forbidden wisdom leads to violence and death.