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Hall See this Venona cable in its entirety
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The November 12, 1944 cable:
Theodore Alvin Hall and Saville Sax

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This cable is the first of eight decrypted KGB cables that mention Theodore Alvin Hall, a precocious Harvard-trained physicist who began passing information on the atomic bomb to the Soviets soon after he was hired at Los Alamos at age 19. Because this is the first cable that mentions him, Hall's name is used in clear text; in later cables he appears under the cover name Mlad ("Youngster").

A young prodigy, Hall began studying at Columbia University at age 14 and graduated from Harvard at 18 with a degree in physics. Brought on the Manhattan Project in early 1944, Hall joined a group working on the physics of implosion, a critical element in the design of the plutonium bomb. In October of that year, he met with his best friend and former Harvard roommate, Saville Sax, wishing to make contact with the Soviets. (Like Fuchs, Hall approached the Soviets, not the other way around.)

Hall The Soviets dubbed Ted Hall "Youngster," because he was only 19 when he became a spy.

Hall eventually met with Sergey Kurnakov (Bek in the cable), a Soviet journalist and KGB agent living in New York. Kurnakov told his superiors that Hall had "an exceptionally keen mind and a broad outlook, and is politically developed," meaning he was a committed Communist. He also did not waste time. At his first meeting with Kurnakov, Hall handed over documents that provided specifics both of research and who did what at the Manhattan Project.

As the cable points out, Kurnakov's superiors, one of whom was Stepan Apresyan, chief of the New York office of the KGB, decided to retain Hall as an agent. Sax, who went by the cover name "Oldster," was the initial liaison and periodically traveled to New Mexico to accept more materials from Hall. This went on until Hall left the Manhattan Project after the war's end.

In 1949, when Venona workers decrypted this cable, the FBI set their sights on Hall and Sax. In 1951, they interviewed the pair, independently, but both denied any involvement, and neither was arrested.

Sax Like his best friend Hall, Saville Sax somehow escaped prosecution for his crimes.
Hall went on to get a doctorate in physics from the University of Chicago, then took a job at the Sloan-Kettering Institute for Cancer Research in New York. In 1962, he and his wife Joan Hall moved to England, where he became a biophysicist at Cambridge University's Cavendish Laboratories. Sax died in 1980.

In its initial release of the Venona documents in 1995, the National Security Agency blotted out the identity of Youngster. But the Venona cables supplied just enough information for Washington Post reporter Michael Dobbs, in a February 25, 1996 article, to break the story of Hall's involvement. Till the day he died—November 1, 1999 at the age of 74—Hall never fully admitted to undertaking espionage.

The November 12, 1944 cable
Note: Consult the footnotes at the end of the cable for identities of individuals and definitions of terms appearing in capital letters.
Rosenbergs and the Greenglasses intercept page 1

Rosenbergs and the Greenglasses intercept page 2

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