French National Museum of Natural History

The French National Museum of Natural History is both a repository of scientific collections and a wartime institution trying to keep its treasures out of reach. As danger closes in on Paris, its work shifts from cataloging and display to packing, securing, and moving objects. The museum’s elaborate precautions around the Sea of Flames show how preservation becomes a contest over custody: the stone is protected by decoys and safes, but the people and records connected to it remain exposed to coercion, arrest, and uncertainty.

Collections and Institutional Work

In the spring before the flight from Paris, the museum’s collections encompass fossils, ancient manuscripts, thirteenth-century jade, cavansite from India, rhodochrosite from Colorado, pearls, gold nuggets, and a sapphire described as large as a mouse. The approaching war changes the practical meaning of such abundance. Memos direct that collections be protected; a small group of couriers begins carrying objects to country estates, locks and keys become urgently sought, and armored trucks wait at the loading docks. Daniel LeBlanc, the museum’s principal locksmith, works late into the night to padlock crates and keep transport manifests secure. Preservation here is not an abstract mission: it depends on containers, routes, paperwork, and the skilled labor of staff.

The institution’s mineral holdings also rest on a long documentary history. During a visit to the Gallery of Mineralogy, Professor Hublin explains that Louis XIII began the collection as a Cabinet of Medicines, in which materials were associated with remedies for particular ailments. By 1850, the catalog already contained two hundred thousand entries. The museum’s vast organizational folios make its mineral heritage legible through accumulated records, even as display cases stand vacant after objects have been removed for safekeeping. The contrast between the empty outlines on the shelves and the extensive catalog suggests two different forms of custody: objects can be moved from view, while their institutional identities persist in records.

Safeguarding the Sea of Flames

The museum’s protection of the Sea of Flames depends on deliberate uncertainty. Its director arranges for three replicas to accompany the real diamond, sending the four stones in different directions: one remains at the museum, while the others travel with a young geologist, the chief of security, and Daniel. No courier is supposed to know whether the stone in his charge is genuine; each is instructed to act as if it is. The plan turns ignorance into a security measure, but it also leaves Daniel unsure of what he carries. In a field west of Versailles, he takes the stone from a linen bag beneath the lining of his woodworking-tool case and studies its blue glow, still telling himself that the museum would not entrust a tradesman with a diamond of one hundred and thirty-three carats.

The museum’s defenses include physical barriers as well as decoys. A small locked door at the back of the main-floor gallery requires two keys. Beyond it, a corkscrewing stone staircase, another locked gate, corridors, and a storeroom lead to a combination safe. The assistant director opens the safe; the mineralogist helps lift out a second, heavier box. Yet the route is less formidable than its sequence of locks implies: there are no alarms and only one guard. The scene reveals an institution whose security depends on layers of procedure and a small number of people, rather than on an impregnable system.

The replicas create a further problem of provenance. Two months before the invasion of France, Dupont makes three copies using a casting; he never sees the real diamond. When Reinhold von Rumpel questions him, von Rumpel believes his account. The casting separates the act of copying from direct knowledge of the original, while the decoy plan separates possession from certainty. Later, von Rumpel counts four stones—one in the museum basement and three still to find—and tries to infer who might have carried each. The museum’s effort to protect the jewel thus gives rise to a search in which even the institution’s own distribution plan cannot tell an outsider where the original is.

Staff, Custody, and Exposure

The museum’s security arrangements make its employees indispensable and vulnerable. Daniel’s work as a locksmith, his seven skeleton keys, his files and saws, and his notebook of architectural measurements become suspicious evidence after plainclothes policemen seize him outside Vitré. French interrogators question him first; German interrogators take over later, examining his tools and asking what the keys unlock. The Germans appear to suspect him of plotting to destroy the Château de Saint-Malo, although the basis for that accusation is unclear. He is denied paper, linens, and telephone access. The skills and objects that served the museum’s preservation work are recast as grounds for detention.

The museum remains involved in trying to discover what has happened to him. French policemen later arrive at the LeBlanc household at the museum’s request and report that Daniel has been convicted of theft and conspiracy. They say that prisoners, political or otherwise, are forced to work even without a sentence ordering it, and that the museum has written to wardens and prison directors across Germany. They cannot yet identify the prison, though they believe it may be Breitenau. The exchange establishes the limits of the museum’s reach: it can send inquiries across a prison system, but it cannot immediately locate one of its own employees or secure his release.

Daniel’s letter to Marie-Laure carries the institution’s routines into captivity. He describes manufacturing cardboard all day and recalls that, throughout his life, he was the one carrying keys; now he hears them jangling when guards come for prisoners and finds his own pocket empty. He says that in his dreams he is in the museum. The keys that once marked his practical authority over locks and access have become signs of what detention has taken from him. His message also gives Marie-Laure a clue to look inside Etienne’s house, showing how the museum worker’s knowledge of hidden spaces can continue to guide action even after his arrest.

The Museum as a Trace and a Target

The institution survives in the story not only through its collections but through the traces its work leaves behind. When von Rumpel searches the LeBlanc home, he recognizes a safe maker who lived within walking distance of the museum, worked there all his adult life, and had a blind daughter. A detailed model of the Fifth Arrondissement, woodworking tools, and Braille volumes help him connect the household to Daniel’s craft and circumstances. Yet the model offers no immediate answer about where the diamond is hidden. The museum’s association with specialized skill narrows the search while its protective concealment frustrates it.

The institution also appears in the pursuit of an unrelated cache of gems: French police arrest a burglar who has broken into the chalet of a prominent donor connected to the museum. That report reaches von Rumpel while he is ill and hoping the arrest will advance his search. The incident places the museum within a wider network of donors, private property, police investigations, and gemstone circulation, without establishing that the museum controls every object in that network. Likewise, when von Rumpel asks whether rent checks for a household arrive from the museum, the question records his effort to follow institutional connections rather than proof that the museum is paying them.

The French National Museum of Natural History therefore functions as more than a setting for valuable objects. Its catalogs preserve histories, its staff translate knowledge into practical protection, and its procedures organize the movement of collections under threat. But the same work produces vulnerabilities: keys can be interrogated, manifests and models can direct a search, and a plan built on decoys cannot ensure that every custodian knows what he protects. The museum’s central predicament is to preserve objects whose value invites seizure while depending on people whom wartime power can detain, question, and separate from the things they were charged to keep.