It's more an issue of linguistics than magic. I'm not trying to figure out what put them there or even how, I'm trying to figure out why. I don't even really care why they were on my walls specifically - because they weren't just on my walls so it doesn't even matter that they were there in the first place. All I want to know is if there's enough individual letters to represent a complete alphabet and whether the individual sections of symbols form any kind of words. And I don't need magic to do that. I need knowledge.