Sources Work on the Enigma Machine

Question 1:
Study source A. what can you learn about the work at Bletchley Park?
We can see from the source that everyone was put into separate departments, 'we were very, very departmentalised'. The double 'very' emphasises how severely it was done. We can also learn that their work was very secretive and guarded, 'you never discussed your work with anyone except your little group'. The witness comments on how he 'hadn't a clue what was going on in the rest of the park'. We also learn that only a very few 'real high-ups' knew everything that was going on. This was intentional; it helped to keep any information from being and value to a German spy, which might have been planted at Bletchley Park. This was exaggerated by having to use tubes to send messages, forced by compressed air, from hut to hut. There are no weaknesses in this source. It is a secondary source but was written by an eyewitness.
Question 2:
Study sources A, B and C. does C support sources A and B about the work at Bletchley Park?
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