I think he did pretty much anything for a buck.

At first brush, I wasn't sure whether @IRonMaN  was talking about @invst4u @me or @Houdini.

Then, I read: He had an extremely high IQ... He also debunked the so-called Spirit talkers and other so-called mediums that were prominent and popular in the country at that time, among all classes of people....

and realized it could be about @invst4u, @Me or @Houdini....

So, I take a bow.