Thanks to io9 for posting this awesome recording!

 

Doyle on Spiritualism (1930)

 

And thanks to a commenter in the article who linked to the video!

 

Doyle on his inspiration for Sherlock Holmes and on Spiritualism (1927)

(4:03, where he talks about letters he's received, is gold)

 

These are so awesome. Doyle is a favorite author (because of The Lost World, not because of Sherlock Holmes) and his spiritualistic views are a great piece of secret history.