The correspondence, released under the Freedom of Information Act, shows the Queen wrote to the former German chancellor, Willi Brandt, saying Britain was doing all it could to try to free him. These efforts were stepped up as Hess approached his 80th birthday. But by May 1974 all hope had faded. Of pressing concern was the increasingly cruel treatment by the Soviets.
In a letter by a senior official in the British Military Government to the British ambassador in Bonn paints a particularly bleak picture. Robert de Burlet, who had diplomatic responsibility for Spandau and visited Hess several times, wrote: "now that the possibility of a tripartite démarche to the Russians to appeal for Hess's release ... seems to have receded ... I think I should bring up to date on the current situation at the prison."
Mr de Burlet said the Russian governor at Spandau has demanded that Hess be deprived of his glasses between 10pm and 7am every night. The Russians also insisted Hess burn his notebook before being allowed a new one, restricted his access to the prison garden and refused him physical contact with any visitor, including his wife and son.
Mr de Burlet wrote: "This new Russian turn of the screw, is particularly unpleasant and amounts to the infliction of mental torture on the prisoner. It is made more blatant by the fact that since November 1959 when Hess cut his wrists with a fragment of glass from his spectacles he has been given ones with plastic lenses."
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