The 1948 "Gorsky Memo", found in Soviet Archives, identifies Belfrage as having a covert relationship with Soviet intelligence as a member of the "Sound" and "Myrna" groups. Seven Venona decrpyts reference UNC/9 in passing conversations between Belfrage's bureau chief and Winston Churchill on to the Soviets. Belfrage is referenced in the following Venona decrypts, 592 KGB New York to Moscow, 29 April 1943; 725 KGB New York to Moscow, 19 May 1943, p. 1 725, KGB New York to Moscow, 19 May 1943, p. 2, 810 KGB New York to Moscow, 29 May 1943, p. 1, 810 KGB New York to Moscow, 29 May 1943, p. 2, 952 KGB New York to Moscow, 21 June 1943, p. 1, 952 KGB New York to Moscow, 21 June 1943, p. 2, 974 KGB New York to Moscow, 22 June 1943, p. 1, 974 KGB New York to Moscow, 22 June 1943, p. 2, 1430 KGB New York to Moscow, 2 September 1943, 1452 KGB New York to Moscow, 8 September 1943, p. 1, 1452 KGB New York to Moscow, 8 September 1943, p. 2. During the period in question, the United States and the Soviet Union were wartime allies while at the same time the Soviet Union maintained a spy network of American citizens who passed US secrets to the Soviets.