Update

1). In Polish Stencil codes and secret agent ‘’Knopf’’ I’ve added a link to Intelligence operations in Switzerland - Hans von Pescatore, Captain Choynacki and General Barnwell R. Legge.

2). In The compromise of the communications of General Barnwell R. Legge, US military attache to Switzerland I had written:

‘From the information available at this time it seems that, with one exception, messages enciphered with his systems were not read by the Axis powers……’

Considering the information presented in report KV 2/1329 ‘Willy PIERT / Hans Von PESCATORE’I rewrote that part:

‘According to the postwar interrogations of German intelligence officers operating in Switzerland (2) in 1941 they were able to recruit a spy inside the US embassy in Bern. This person, named Fuerst, had access to the office of the US military attaché General Legge and he was able to take documents plus the used carbon paper and give it to the Germans.

The stolen reports revealed some of Legge’s sources and showed that he got information from his British, Polish and French counterparts. The used carbon paper also contained valuable information but it had to be examined by experts in Germany. The information uncovered from these sources was also used to decipher some of his messages.

The German spy was arrested in March 1942 but this doesn’t seem to have ended the compromise of General Legge’s communications. In the Finnish national archives, in collection T-21810/4, there are a few messages signed Legge from March and April ’43. The originals are from NARA, collection RG 319 'Records of the Army Staff'’