The house where German scientists were eavesdropped on

Imagine being a high-ranking German physicist, suddenly flown to a quiet house in Godmanchester. Some were so shocked by their new reality that they were told to look for an empty can in a trash barrel when they asked for a glass of water.

This was the reality at Farm Hall during 1945. The house was owned by the Secret Service and had been used by MI6 and SOE for agents, but it was repurposed for a peculiar task. The Allies wanted to know how close the German project had been to constructing an atomic bomb. To find out, they interned ten German scientists here and rigged the house with microphones. They wanted to hear the scientists' private conversations, which were observed to be more revealing than formal interrogations.

The scientists were kept in a bubble, listening to the news of the atomic bombing of Hiroshima. The transcripts show the scientists were so convinced of their own expertise that they spent time debating whether the Americans had produced Element 93. They were surprised by the news, and some even doubted that the BBC report was genuine. It was a high-stakes game of eavesdropping where the goal was to gauge the physicists' reactions to Allied progress.

Farm Hall was a country house in Huntingdonshire. It remains a quiet house, though its walls held the echoes of some of the most intense scientific debates of the 20th century.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons