Great tip thanks!  https://theinnatvinthill.com/history  During World War II, in June of 1942, the United States Army bought the farm and immediately the Second Signal Service Battalion began interception of enemy radio communication, establishing the country’s first “listening post” and intelligence training headquarters. In 1951, the federal government established the Warrenton Training Center just outside of Warrenton. The center is a secret Central Intelligence Agency communications facility, which also houses an underground relocation bunker containing communications infrastructure to support continuity of government in the event of a nuclear attack on Washington, DC.  This looks like a good read too (pdf) Legendary William Friedman by Lambros D Calhmahos   "I did not meet William Friedman until after our school moved m October of 1942 to Vint Hill Farms Station Warrenton Va..."  The Account of Sir Charles Wheatstone's Absolutely Indecipherable Cipher Device  ...Another unbelievable piece of luck occurred m 1917 when Mr. Friedman was at Riverbank Laboratories in Geneva Illinois where he was employed as a geneticist mating fruit flies (or rather helping them to mate) The British knew of a geared disk cipher device invented much earlier by Sir Charles Wheatstone which was regarded as absolutely indecipherable if the sequences for both plain and cipher components were unknown. The British did not dare use it earlier in World War I because if the Germans captured it they too would have the indecipherable cipher.  But now since the United States had entered the war the British decided to use this device for joint U S -British communications since its indecipherability was acknowledged by both London and  Washington. But somebody in Washington suggested that perhaps It might be wise to have the device tested by William Friedman at the Riverbank Laboratories which were operated by a wealthy eccentric named Colonel George Fabyan who had a quasi official relationship with the Government. see also Riverbank Labs   Elizebeth Smith (later Elizebeth Friedman), a Shakespearean scholar, was employed by Fabyan to work with Gallup. Later, a geneticist employed by Fabyan, William Friedman, joined the effort, initially as a photographer, and then later drawn into the cryptography effort, such that he eventually became the head of the Codes & Ciphers department in Friedman's lab. Both Elizebeth and William went on to have significant careers in cryptanalysis (a term coined by William), and their work became the foundation for what later became the NSA.