Perizou
Thanks for the ch.! Reading that book makes me think that one of the most amazing skills would not only be to "read" what is or is not a secret/entrance to a secret area, but what the trigger conditions are. Although Hera says that some of the things (like an old gravestone of someone unknown) aren't necessarily that useful/important, I imagine there is a story behind every single one, and to me, that would make them worth finding.