!!Joan Thirsk
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During the Second World War, Joan Thirsk worked as an intelligence analyst at Bletchley Park, providing information that assisted Hut 6 in the breaking of the Enigma ciphers and added substantially to the substance of the subsequent intelligence reports. She worked in the Sixta traffic analysis group alongside her future husband Jimmy. Source: [Wikipedia|http://en.wikipedia.org/wiki/Joan_Thirsk]