(October 18, 1918-July 12, 1985)
A student of Ordo Templi Orientis, which he headed from 1971 until his death in 1985. Or which he was expelled from and formed an illegitimate splinter group based upon. Depends who you ask.
Associate of parsons john whiteside
References
http://www.castletower.org/grady.html
http://www.thelema-oto.org/93/Grady-McMurtry