According to the "BBC", a chimney sweep found the corpse of a dove when a chimney cleaned in Surrey (southeast England) with a holster attached to a red paw. Inside was a piece of rolled paper with the inscription "service Pombo" with 27 blocks of letters written by hand.
The codebreakers of the Government Communications Headquarters (CGHQ) - a center ultrasecret eavesdropping and interception British very successful in the secret war against the Nazis - had to recognize that their computers were unable to decipher the contents.
"This type of messages used in operations were designed so that only the sender and receiver could decipher them," said Tony, a historian who asked that only his name was revealed.
About 250,000 carrier pigeons were used during the Second World War, in particular to transmit information between the continent and Britain occupied.
Now the hope is that there is some decipherer still alive who can solve the puzzle.
