Chapter 19: How does Anglea figure out who the mystery letters are from?

From the text:

Mountain, Angela thought. Turtle’s MT stood for mountain, not empty. And the letter was not from Theo:

Your love has 2, here are 2 for you.
Take her away from this sin and hate
NOW! Before it is too late.
Again two clues were taped at the bottom:
WITH MAJESTIES

“Crow and Otis Amber’s clues are not king and queen,” she told Sydelle. “They are with thy beautiful majesties.”