So, where did it come from exactly and where did it end up?
I ask because I started reading the RE Howard library and there seems to be a disctinction made between fantasy, horror and weird fiction. As far as I can tell, WF proper was printed in…Weird Tales magazine and was roughly analogous to what we would call horror today. Time period, as far as I can tell, appears to be 20’s-40’s and maybe a little longer.
But it seems a bit more complicated. Conan appears to be listed as weird fiction. Is this to contrast Conan and the style of telling these stories as opposed to straight historical fiction like Tros? WF also appears to be different from science fiction and I came across an essay by Clark Ashton Smith (I think) who discussed what magazines printed what sort of fiction and there appeared to be a big difference between WF, historical fiction, fantasy, sci-fi, etc.
So, what differentiated WF from horror stories that came before (Frankenstein, Dracula, etc.) and ones that have come after (Stephen King, Lumely, etc.). Why is Conan weird fiction, but Fafhrd and the Grey Mouser or Elric fantasy? When did the disctinctions arise?