The Ritual on Saint John's Eve and Belbo's death is the novel’s decisive collision between a fabricated conspiracy and the human need to believe that existence means more than a pattern imposed on it. Recalled by Casaubon after the event, the ritual ends when Jacopo Belbo refuses both the secret demanded by his captors and the false salvation they offer; the group kills him rather than let its long pursuit collapse into disclosure or doubt.

Background and Recall

Much of the event reaches the reader through Casaubon’s later recollection. Speaking to Dr. Wagner, he says that everything he had been thinking about himself, Belbo, and Diotallevi came out, above all what had happened on Saint John’s Eve. The confession is not a detached report of a fully verifiable scene: Casaubon later allows that the night at Saint-Martin-des-Champs may not have happened exactly as he saw it, because music and incense had affected him. Still, he insists that something happened, comparing the uncertainty to Amparo’s experience in an Umbanda ritual: she did not believe she had been possessed by Pomba Gira, but knew that something had possessed her in the tenda.

The ritual’s immediate background is the group’s pursuit of a supposed secret associated with the Plan. By the time Casaubon reflects on the night, Lia has persuaded him that the Provins message was merely a laundry list: there were no Templar meetings at the Grange-aux-Dîmes, no historical Plan, and no authentic message. Yet the absence of an original secret does not undo the force the search has acquired. The group has built its identity around the expectation that every fragment connects to a hidden whole.

The Secret and the Group

Casaubon comes to understand the night’s confrontation as the product of a secret that gains power precisely because it has no stable content. The group’s search has held its members together across excommunications, internal struggles, and coups. Their unity depends less on possessing knowledge than on the promise that knowledge is just out of reach. A secret revealed would shrink into something ordinary; a secret that continually slips away can sustain initiation and desire indefinitely.

Belbo’s refusal intensifies that dynamic. The group takes his insistence that he has no secret as evidence that he must have one: if the secret were false, they reason, he would simply reveal it. The less he concedes, the greater the imagined value of what he is withholding. Casaubon sees that this circular belief is not a side effect of the search but its adhesive. The men need the secret to remain both imminent and inaccessible, because its final disclosure might deprive them of the mystery that gives their collective pursuit its purpose.

Aglie’s position makes that dependence personal. Casaubon imagines that Aglie knows Belbo’s confession would strip away the mysterious authority behind his claim to be the immortal Saint-Germain. If Belbo revealed the secret to everyone, Aglie would lose his aura; if he whispered it to Aglie alone, the older man could preserve his status. Aglie therefore tries to draw Belbo into a private disclosure, then provokes him when persuasion fails. In Casaubon’s reconstruction, Aglie understands that Belbo’s stubbornness and sense of the ridiculous may overcome even his fear of death.

Belbo’s Refusal and Death

Belbo faces two distinct demands, and Casaubon connects them through the repeated answer “No.” Earlier, Belbo had refused the premise that Abulafia’s password would unlock hidden knowledge. To the question of whether he had the password, he answered no: not because he possessed a magical key and chose to conceal it, but because he would not pretend that such a key existed. For Casaubon, admitting ignorance leaves open the possibility of learning; falsely claiming a solution closes it.

On Saint John’s Eve, Belbo says no again, this time to the salvation held out by his captors. He could have invented a map or used one of the maps Casaubon had shown him. The Pendulum was improperly hung, and even if the group found the supposed X marking the Umbilicus Mundi, it would have taken them decades to realize they had reached the wrong one. Belbo nevertheless refuses to manufacture a map that would satisfy them. He will not bow to their demand for power, but Casaubon finally interprets his refusal more deeply: Belbo will not submit to nonmeaning dressed up as a guaranteed Plan.

The group chooses to kill him rather than face the disappearance of its desired object. It may lose the map, Casaubon reasons, but it can continue searching for centuries; killing Belbo preserves the force of its desire. His death thus does not resolve the conspiracy. It leaves the believers with the same hunger, now reinforced by the very refusal they could not overcome.

Consequences and Significance

In the aftermath, Casaubon distinguishes between the Plan’s fabricated connections and the possibility that some meaning exceeds them. He wonders what Belbo understood in his final refusal: what allowed him to resist surrendering his fate to people promising a ready-made explanation, and to sacrifice his life rather than accept it. The question remains open, but the contrast is clear. The Plan offers a total structure in which every event can be made to confirm every other; Belbo’s last act refuses to treat that structure as truth merely because it claims to explain everything.

The episode also makes Casaubon’s account deliberately unsettled. He cannot certify every detail of what he witnessed, yet he does not dismiss the night as nothing. His comparison with Amparo’s uncertain possession gives that distinction a form: an experience may resist a single reliable explanation without becoming unreal. The ritual’s meaning lies not in proving supernatural powers or validating the Plan, but in revealing the consequences of treating an unverified secret as the foundation of identity and authority. Belbo’s final refusal breaks that logic for himself, even as his death leaves the group’s pursuit intact.