She popularized the walk-in theory.

George Hunt Williamson (1926 – 1986), aka Michael d'Obrenovic and Brother Philip, was an American flying saucer contactee, channel, and metaphysical author who came to prominence in the 1950s.

UFOs, Hippies, New Age and religion.

I used to frequent New Age bookstores in Kitchener and often wondered who these authors were and what influenced them. What was all the Ascension stuff based on and what, if any, significance places like Mount Shasta or Sedona have(none, only if your believe it). It’s somewhat fascinating with the terms “Maitreya”, “Uriel” and “Elohim” pop up.

UFOs and the New Age movement phenomenon of ‘walk-ins’.

Williamson invented the concept of 'walk-ins,' who he called 'The Wanderers.' Walk-ins are normal humans who are actually (unknown to themselves) reincarnated 'Space Brothers.'

Dorothy Martin ~ ‘Sister Thedra’

I like to play connect the dot and see where it leads me.

Enthusiastic members of her circle were Dr Charles and Lillian Laughead (who appear as Thomas and Daisy Armstrong in When Prophecy Fails [http://pvrguymale.blogspot.com/2011/07/leon-festinger-1919-1989-was-american.html]).