       | £13.50 They Listened In Secret By Gwendoline Page A collation of Wrens' memories of working at Bletchley Park. Edited by Gwendoline Page.   £6.50 Top Secret Ultra By P Calvocoressi Written by Peter Calvocoressi, a former worker at Bletchley Park for much of the war. He worked in Hut 3 in a team whose task was to translate and decrpt German Amy and Air Force signals. |
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