Small, random questions about RotE that still bother you (spoilers all RotE books)

[Nuytsia]

Here's one:
I'm not sure exactly what Fitz is referring to when, at the end of Assassin's Apprentice (the last chapter before the Epilogue) he says:
"I think I finally guessed then what the earring signified" (p 455 of the book I have here)

This is when he's talking to Burrich about what to do next .......

I have an idea what it could mean, but as Fitz doesn't know what the earring is at that point, I'm not sure what is implied that FItz thinks it signfies?

Minor point re a previous post: 'Chade Fallstar' is first mentioned in Assassin's Apprentice in one of the chapter introductions - Chapter 18. It doesn't tell us how he got the name though.