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In page Patricia Bartley:

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By the autumn, the team had expanded to four people and moved to the Diplomatic Section[2] in Elmers School. By the spring of 1942, a photo taken at Wavendon School shows 12 people in the section. That spring, the Diplomatic Section moved to new quarters in Berkeley Street in London as part of the reorganisation of Government Code and Cypher School which replaced Commander Alastair Denniston with Edward Travis; Denniston moved with the Diplomatic section to London and Travis took over at Bletchley Park.[citation needed]