Carol of the Old Ones:
Via Hell in a Handbasket, whose proprietor is a Call of Cthulhu game master from back in the day. I did a couple games of that back then, too, including one that took place in an insane asylum, where everyone was already crazy. Also, I corresponded a bit with Lynn Willis at Chaosium, and he wanted to use a scenario I sent in in the core rules for the sixth edition. But that didn’t come to pass. After I said Chaosium should reprint some of the old Lovecraft stories, he sent me a copy of The Hastur Cycle. But I’ve probably hammered that story from those days where I fancied myself a writer over and over again.