The newest discovery revealed by Martin Wagner is a Robert Anton Wilson article, "Magick." The byline is given as the "Abbey of Thelema," but Martin says it is likely RAW. It's from Green Egg, December 1975.
The article is in two parts, a definition of magick and then two experiments.
Two quotes from the article:
"Magick assumes the existence of an “astral” realm apart from the known physical and energetic universe known to modern science."
“Magick, like science and unlike religion, is not dogmatic, does not ask for faith, and positively encourages scepticism and original thinking/research.”