When did Quigley 's role end ?
Jim Marrs , whose work was used as a source by Oliver Stone in his film " JFK " , cites Quigley in his book " Rule By Secrecy " , which describes a conspiracy linking the Milner Group , Skull and Bones , the Trilateral Commission , the Bavarian Illuminati , the Knights Templar , and aliens who posed as the Sumerian gods thousands of years ago .