Chapter 3: Page 14: Line 1 (92)

 I was not there when they met,— or, not in the usual Way.

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Line 92 Vulgarized:
I wasn't physically there when they met. But it's like I was there and after I tell you about how they met, it'll be like you were there too. That's sort of how stories work!

Subtext:
Reading history is like being an observer from a point far in the future. When you remember an event you took part in, you're not at the event, not in the usual way. You're an outside observer even though you originally took part in that event. It's the same thing when you hear a story or read about an event you didn't take part in. It's like looking at the event through memory, even if that memory isn't yours. But in some sense, the person who did take part consulting their memory is exactly like a person who didn't take part consulting history. We can all be at an event, no matter where we are in space and time. Maybe "not in the usual way" but via history and communication and stories.