TheCodeBreakers
UQX UFQ RQK
i tt e
The KWZ and UOB appeared to be nulls, used—almost certainly in
violation of regulations—as word dividers, and REM probably meant
Kommandant. When Berthold checked this against the second message,
he saw at once that it had the same plaintext. The repetitions of the
plaintext i's and t's, which had been masked by the homophones and the
lexicon of the KRU code, appeared clearly in the trinumeral message as
the repeated 245s and 659s. With these four points as anchors, Berthold
could set up the following equivalencies:
845 422 373 792 240 245 068 652 781 245 659 659 504 An [?] Bn. 2
h i r sch w i t t e
A staff airplane sped his result to the British cryptanalytic bureau,
and Berthold telegraphed it in a special code-breakers' code to the
French. It was a Rosetta Stone for a new forward code called the
Schliisselheft. The three bureaus cooperated closely, but it was largely
annaabi.ee 
