Who exposed A.A.’s cofounder to spiritualism?

Where did Alcoholics Anonymous cofounder Bill Wilson first become introduced to spiritualism? Wilson spent many years communicating with demons posing as the dead.

According to his official A.A. biography, Wilson “thought of himself as having some psychic ability; to him, spiritistic matters were no mere parlor game. It’s not clear when he first became interested in extrasensory phenomena; the field was something that Dr. Bob and Anne Smith were also deeply involved with. Whether or not Bill initially became interested through them, there are references to seances and other psychic events in the letters Bill wrote to [wife] Lois during that first Akron summer with the Smiths, in 1935.” From ‘PASS IT ON’ pg. 274

Who were Dr. Bob and Anne Smith? Well, Dr. Bob was the other cofounder of A.A., and Anne was his wife. PASS IT ON notes that Dr. Bob and Bill Wilson “were drawn to spiritism and extrasensory phenomena.” (pg. 156) 

 As for the person who turns to mediums and to spiritists, to play the harlot after them, I will also set My Face against that person and will cut him off among his people. You shall consecrate yourselves and be holy, for I am the Lord your God. (Leviticus 20:6-7)