 So it was very popular at that time as well. And he thought that this idea of seances and table wrappings and levitations and ectoplasm and planchettes, Ouija boards, all these things that mediums were using to connect with the dead, he thought that that was just silly. He called it a lot of unscientific nonsense. Why would the dead use that? Why wouldn't they use something more sophisticated to speak with the living?