“The Jermyn Horror” takes place in Britain, beginning in London and then moving to Huntingdon with the investigators seeking a rare edition of Regnum Congo, reputedly to be found in the crumbling estate of the deceased Jermyn family as described in Lovecraft’s “Arthur Jermyn”. The search is imperiled by a creature that a Jermyn brought back from the Congo some three hundred years ago that haunts the mansion seeking a human vessel for its escape.