Chapter 3: Page 14: Line 2 (93)

 I later heard from them how they remember'd meeting.

* * * * * * * * * *

Line 93 Vulgarized:
Mason and Dixon told me, later, how they remembered their first encounter with each other.

Subtext:
Not only did Reverend Cherrycoke not see their meeting firsthand, he must rely on Mason & Dixon's memory of that first meeting. Knowing how memory works, Mason and Dixon's original meeting has already been replaced by the way Mason and Dixon remember their meeting. And now Cherrycoke will describe to his audience how he remembers Mason and Dixon remembering that meeting. That's history. It's an unreliable narrator telling other people's memories as best as they can remember them. We like to think of history as inviolable text, handed down from trusted authorities. But what it really is is a story rife with bias, prejudice, exaggeration, misremembrances, and patches made out of whole cloth.
    What Pynchon is setting up is an answer to this question: "How much truth is in Pynchon's novel?" And his answer is simply, "How much truth is in history?"