And... apparently it was the last story ever written by him. Creepy...
Oh awesome. I didn't know that when I read it. It did seem to significantly depart from his usual/later works. I get the feeling he wanted to communicate some feelings that were away from sci-fi and monsters. Very easy story to use as a metaphor for how he saw his own life to that point.
Yeah, probably one of the reasons why it's so good. When they do this one as the last HPL-fiction-based podcast episode, it sure will be epic.