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Clair de Lune

All the Light We Cannot See

Clair de Lune is a recurring piece of music whose meaning changes with the circumstances in which it is heard. In Saint-Malo, it descends from an improvised attic radio system as part of Etienne LeBlanc’s clandestine broadcasts. For Marie-Laure LeBlanc it carries the memory of her grandfather; for Werner Pfennig and Frank Volkheimer, hearing it amid the war’s destruction opens a path to memories that have seemed remote. Its repeated return links private recollection across distance and becomes part of a moment of practical action in the rubble.

First Broadcast and Family Memory

The song first reaches Marie-Laure after Etienne has spent a day working above her room. He enters the wardrobe, cuts through its back and the attic door behind it, then crawls through the opening to build an apparatus among cables, pliers, tools, booklets, and electrical components. Marie-Laure follows him into the garret, but the work remains largely beyond her understanding. That night she falls asleep below while her great-uncle continues working overhead. When she wakes, music is coming through the ceiling: Clair de Lune, followed by the recorded voice of her long-dead grandfather speaking about the human body’s blood vessels. The sound reveals what Etienne has built: not merely a concealed technical arrangement, but a means of bringing her grandfather’s voice back into the house.

Etienne comes down the ladder and reaches Marie-Laure through the back of the wardrobe. Before he explains what he has done, she knows he is going to tell her that her father asked him to keep her safe. The song’s first appearance is therefore bound to a specific family promise. It does not erase the separation from her father or the death of her grandfather; instead, it makes recorded music and speech audible within the home where she and Etienne are living.

Music Within the Secret Broadcasts

The broadcasts continue for months. Every few days, new slips of paper arrive inside a loaf of bread, carrying material for the transmissions; alongside the numbers, Etienne begins playing music. He broadcasts only at night and offers brief fragments, sixty or ninety seconds at most. Debussy, Ravel, Massenet, and Charpentier are among the composers whose records he uses. As he had done years earlier, he places the microphone in the bell of his electrophone and lets the record spin. Clair de Lune belongs to this recurring practice of sending music out with the coded transmissions.

The music gives the broadcasts a distinctive presence, though Etienne cannot know who receives them. He imagines hidden shortwave sets in oatmeal boxes, under floorboards, beneath flagstones, or inside bassinets. He pictures listeners along the coast and at sea, including people aboard free ships carrying tomatoes, refugees, or guns. In his imagining, they expect the numbers but not the music, and may wonder why it is there. The song thus travels within a communication effort whose audience remains uncertain: the transmissions cross occupied territory and open water, but the listeners are unseen.

In December 1943, the music remains part of Marie-Laure’s daily life in a city grown bitterly cold. She hears Etienne’s footsteps and voice crossing the ceiling, followed by her grandfather’s song straining down through the rooms. Outside, aircraft make low passes over Saint-Malo, while rumors circulate that only essential personnel and people with medical reasons will be allowed to stay. Etienne insists that he and Marie-Laure will not leave while their work might do some good. Against that unsettled background, the song recurs as a familiar sound from the attic, connecting the hidden broadcasts to the household’s continuing resolve to remain.

Recognition in Werner’s Radio

Much later, Werner hears a transmission emerge from static. A voice in a Breton accent gives the time of the next broadcast and a sequence of numbers; then a piano plays three notes, followed by two. Werner immediately recognizes the transmission’s quality and the voice as matching broadcasts he heard before. As the music unfolds, he recalls himself at six years old, Jutta Pfennig leaning toward him, Frau Elena kneading bread, and a crystal radio in his lap. The recollection makes the broadcast more than an intercepted signal: for Werner, it briefly restores a childhood world before war and military service separated him from it.

His response is sharpened by the circumstances around him. Frank Volkheimer is behind him, and the men in the vehicle are asleep. Werner covers the meter with his hand and waits for Bernd to acknowledge what he is hearing, but no one responds. As the music continues, Werner remembers not only the radio and home but also his own choices: he stood by when Frederick refused to participate in the abuse inflicted on him, and later watched Volkheimer enter houses during the recurring violence of their wartime mission. Clair de Lune does not settle Werner’s guilt or change what has happened. Its arrival instead places the remembered safety of childhood beside the actions he now understands himself to have permitted.

The Song in the Rubble

At the ruined Hotel of Bees anti-aircraft strongpoint, static is the only sound coming through the radio that Werner left with Volkheimer. Werner is asleep beneath the wreckage, while Volkheimer remains awake, listening because he lacks the will to remove the headphones. Impossibly, the static becomes music. As the piano moves up and down its scales, Volkheimer remembers leading horses through a forest at dawn with his great-grandfather. They reach a frozen pond and a pine tree as tall as a cathedral; his great-grandfather kneels and begins sawing into its bark.

Volkheimer stands, finds Werner’s leg in the darkness, and puts the headphones on him, urging him to listen. Werner wakes and recognizes Clair de Lune. The name also prompts a verbal association with Claire, a girl he imagines as clear enough to see through. The sequence carries the song from radio reception into shared action: Volkheimer tells Werner to connect the light to the battery. Before the music has stopped, Werner disconnects the radio, removes the bulb and bezel from a dead field light, and touches them to the leads, giving them a sphere of light. Volkheimer uses the illumination to move masonry, timber, and broken wall sections, build a barrier, and prepare a grenade at the former stairwell.

Across these appearances, Clair de Lune connects a recorded grandfather’s voice, Etienne’s months of nighttime transmissions, Werner’s childhood radio memories, and Volkheimer’s forest recollection. The song is heard by different people in different places, but each return brings something absent into the immediate present: a family voice, a remembered home, or a landscape from childhood. In the final appearance, that inward movement is joined to a concrete response to the men’s entrapment. Music does not undo the war or guarantee their escape; in the darkness beneath the ruins, it accompanies the recognition and action that let them use what they have at hand.