As a British Intelligence Officer during World War II, Hugh Trevor-Roper was expressly forbidden from keeping a diary. However, he confided a record of his thoughts and plans to a series of notebooks inscribed OHMS ( On His Majesty s Service ). The Wartime Journals reveal the voice and experiences of a wartime codebreaker who spent most of the war engaged in highly-confidential intelligence work including breaking the cipher code of the German secret service. He became an expert in German resistance plots and, after the war, interrogated many of Hitler s circle, investigated Hitler s death...