Casaubon and the Police
Foucault's PendulumCasaubon's omissions in the Ardenti case leave him entangled with De Angelis, whose investigation demonstrates the risks of treating every mystery as a connected plot.
increasing
Bearing strength in each event
decreasing
A First Encounter

The Unexplained Hotel
An investigation begins
De Angelis questions Belbo and Casaubon about Ardenti's disappearance. Both men conceal the existence of the Provins document and misrepresent what the colonel told them.
A compromised witness
Casaubon justifies the lie as a principle when dealing with police. His choice nevertheless makes the two friends share a lasting unease.
A Return to the Case

Synarchy and Suspicion
A request for help
De Angelis asks Casaubon to interpret conflicting claims about synarchy. The inspector admits that political and occult language makes his work difficult.
An honest uncertainty
Casaubon cannot give him a reliable answer and suggests that conspiracy claims can explain people's failures. De Angelis remains willing to listen, but neither man resolves the case.
A Lost Ally

Fear Wins
A final warning
Belbo tries to contact De Angelis when the bomb-suitcase plot leaves him in danger. De Angelis says threats to his family have forced him to accept a transfer.
The consequence of silence
The inspector refuses to intervene, and Belbo loses a possible source of help. Their earlier mistrust becomes part of the chain that leaves him isolated.
After Ardenti disappears
After Casaubon returns from Brazil
Before Belbo's final journey