It might be. Just because we're making connections, doesn't mean any of it's true. Not without irrefutable proof.

[ he glances around, more suspicious of the masked dancers who may actually be cultists. he was joking at first. he really didn't want it to be cultists. ]

But I remember where I recognize the symbol from now. In the story, the narrator contemplated the words of a philosopher named Hali, also known as Hastur, known in other stories as The King in Yellow.