Cryptogamist vs cryptogramist
At some point, it occurred to Tandy that the Ministry may have made a mistake. The exact details are lost to history, but it became clear that someone had mistaken his job of cryptogamist for a cryptogramist—a codebreaker, which is exactly what men like Alan Turing were doing at Bletchley. The mistake led to a moss specialist being deposited into one of the most intense covert operations of the war.
Needull in a haystack 