Chapter 7, "She hangs on the western wall," begins in 1956 in the offices of Dudley Eigenvalue. The dentist shows Stencil the Younger an amazing set of false teeth which he has built. Pynchon reveals that Eigenvalue and Clayton ("Bloody") Chiclitz are "part of the same Circle." Reflecting on Stencil's quest, Eigenvalue thinks to himself:
These gathers of cloth can be seen as depths of a "V." This idea of history as a series of interlocking crests and troughs can be found in Ch 9, "Mondaugen's story," on p235.23-7 and chapter 11, "Confessions of Fausto Maijstral," on p307.29-36. Following these deep thoughts, the narrative weaves its yarn back to Florence in April of 1899.
Chapter 13: In which the yo-yo string is revealed as a state of mind
389-391: Profane and Stencil decide to steal Eigenvalue's set of teeth as a "peace offering" to V. Stencil dangles Profane off the roof so that he can kick in the office windows.