The Da Vinci Code
The Da Vinci Code
by Dan Brown

The Da Vinci Code: Chapter 13 Summary & Analysis

Summary
Analysis
Sophie says Fache is convinced Langdon killed Saunière, despite the lack of motive. The curator was well-loved, and it will look better if DCPJ has a suspect in custody when the news breaks in the morning. Sophie is helping Langdon because she believes he’s innocent and because she feels personally guilty for his involvement. Sophie believes Saunière left the invisible message for her specifically, using the Fibonacci sequence as a way to involve cryptographers. Additionally, The Vitruvian Man is her favorite Da Vinci work, which Saunière knew. Langdon realizes Sophie had a personal relationship with Saunière, which she confirms, though they had a falling out years ago. As further proof, Sophie claims “P.S.” stands for “Princesse Sophie”—Saunière’s nickname for her, his granddaughter.
Fache’s eagerness to pin Saunière’s murder on Langdon suggests he is primarily concerned with appearing authoritative rather than serving justice. Sophie believes Fache is misinterpreting clues which were meant for her, since Saunière was her grandfather. Indeed, she seems better able to interpret his intentions from these obscure messages better than the police, who are baffled. That Saunière knew Sophie’s favorite Da Vinci work signifies their prior closeness and their shared affinity for art in general.
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