 So there were other writings after that 1920 story came out that I think give pretty good evidence that he was serious about this and was really trying to develop something to talk to the dead, which I don't doubt. I mean, this was the guy who recorded voices for the first time, and that seemed impossible, and he didn't seem to let anything stop him. So why should this seem impossible to him? Now, what's the story about the man-bats that live on the moon?