• Biography: historical, political & military
      March 2016

      Thirty Secret Years

      A.G. Denniston's Work in Signals Intelligence, 1914-1944

      by Robin Denniston

      30 Secret Years reveals how an enterprising Scottish linguist was able to decipher German naval messages in the Admiralty in World War One. Alastair Denniston became head of the British government’s cabinet noir

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