he also directed and himself conducted special studies with a view to uncovering the cryptopgraphic principles underlying the B-machine. He wishes to take this opportunity to indicate his gratification of the demonstration, by his assistants, of their grasp of the cryptanalytic techniques taught them as a result of their participation in the training afforded by the Signal Intelligence School, as well as his pleasure at the manner in which the individual members of the team earnestly and wholeheartedly collaborated in this joint effort. He also wishes to express his appreciation of the important assistance rendered by the Officer in Charge of the Signal Intelligence Service, and his commissioned assistants, in expediting the procurement of personnel, supplies, and special information when needed.
October 14, 1940
| William F. Friedman, |
| Principal Cryptanalyst. |
