Intercepted Soviet intelligence traffic is alleged to reveal a covert relationship George had as a cutout transmitting information from James Walter Miller, who worked in the U.S. Post Office's Office of Censorship to the San Francisco KGB [REF].
Harrison's role receives mention in the memoir of Whittaker Chambers: The "Old Man" {Isaac Folkoff} is a California businessman and lifelong Communist of Russian birth, very active in party affairs on the West Coast .