Really good. Kind of obscure - two classical categories is kind of a lot for a general audience, even one as estimable as PuzzGrid players - but that's not necessarily a bad thing, just something you should know. Really cool categories, herrings, and general sense that "all of these things could go together WTF am I doing," though.

Downgraded because there's not a lot of common knowledge to draw from, it all seems like very specific subjects and not very broad. All are just groups of nouns/noun phrases (almost all proper nouns). Would like to see more variety in the types of connections rather than "four rivers, four muses, four hills, four types of crocodile."

Also, I typed "crocodile" and it was not accepted. I recommend fixing this.