[Solved] 19th century mixed-race occultist

I am combing through the archives and for the life of me I cannot remember which episode it was where Greg asked the author to speak about this previously unheard of 19th century mixed-race occultist who was extremely successful in the Eastern part of America. So fascinated, I had immediately bookmarked his wiki page but somehow it has disappeared from my phone. It was an episode from this year but like I said, I cannot find it. I wanna say the occultists name was maybe Bosley, idk. Does anyone know who or what I am talking about?