From what I can tell, there seems to be a pattern. Running around finding bot leves always have carpentry and leatherworking (though I stopped seeing leather as I am only lvl 14 in that craft). And those all have guilds in gridania. So if someone checks this you might be able to figure it out by looking at the uldah/limsa ones.
[edit] /sigh maybe not. A goldsmithing leve popped up in a botany area.