Chapters 111-120 Summary

This section begins with Casaubon still in Belbo's apartment, deciding whether or not to leave Milan and follow Belbo to Paris. Realizing there is no one else in Milan to help him and feeling the pulls of friendship and loyalty, Casaubon heads off to Paris. Remembering an address once in Paris, Casaubon takes a taxi to a small occult bookstore in a dark alley. Without thinking, Casaubon asks the proprietor if he knows where to find Aglie. The man looks startled and Casaubon leaves. He makes his way to the Museum and hides in the Periscope. At this point, the narrative picks up where the novel began, with Casaubon waiting in the Periscope.

After waiting for hours in the Periscope and going back through all of his memories about Belbo and the history of the Plan, Casaubon decides it is time...