Basement Darkroom Secrets: How Silvermaster Fed Soviet Ciphers
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Basement Darkroom Secrets: How Silvermaster Fed Soviet Ciphers
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A hidden darkroom in a Washington basement turned top-secret government documents into rolls of microfilm smuggled on a train-sometimes forty spools at once. Who enabled a network that reached from the Treasury to the White House, and how did their secrets travel undetected for years?
In this episode, we lay out the sequence of people, places, and events that sustained a long-running channel of classified material photographed in a private home and carried north by a woman with a knitting bag. How did security flags, high-level endorsements, a defector’s testimony, and Venona decrypts only revealed decades later finally reveal the full picture?
Person: Nathan Gregory Silvermaster
Date of birth: November 27, 1898
Event: Basement darkroom used to photograph classified documents
Case: 65-56402
Date of public declassification: 1995
- The FBI file on Silvermaster grew to over 26,000 pages.
- Silvermaster became a naturalized American citizen in 1926.
- The Civil Service Commission recommended on July 16, 1942 that Silvermaster be barred from federal employment.
- Elizabeth Bentley transported microfilm every two weeks, once carrying 40 rolls in a single trip.
- Classified confirmation of the case was released 31 years after Silvermaster’s death in October 1964.
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