Just found this thread and its references to '40s Captain Marvel artist Bob Butts, whose post-comics career was unknown.
Bob Butts left comics but later published a series of books under the name Robert Butts, co-written with his wife Jane Roberts, that had a huge influence on the New Age spiritual movement in the 1970s. Info can be found here:
http://en.wikipedia.org/wiki/Jane_Roberts
http://en.wikipedia.org/wiki/Seth_Material
It is in the book "The Magical Approach" that Butts writes about his history illustrating Captain Marvel comics (pp.36,37,39)
Robert Butts died on May 26, 2008.
http://www.paulhelfrich.com/essays/in-memoriam-robert-f-butts/