Symbols in Lake Rathe are all over the place. A GM event from last year is how a few people on the server got titles, essentially we had to determine and research the possible meaning of the symbols including finding other instances of them. Ultimately it looks like they're part of a calendar foretelling of future events that came true throughout the history of EQ and EQII. There's debate about the ultimate meaning but I personally think it has to do with Mayong Mistmoore ascending to god status.
Here's a link to the thread with a large portion of the work people did outside of game, the event was truly awesome and Mixxit did a great job.
http://www.project1999.org/forums/sh...ghlight=sunder