Now there's an enigma. Code-breakers may finally have met their match in a mysterious handwritten note found on a dead carrier pigeon. Experts say the note—and the bird—date back to World War II, but they can’t figure out what the message means. The bird was probably carrying the message from British units stationed in France around the D-Day invasion, when it got lost and died in a chimney in Surrey, England. The pigeon was found in 1982. The mesage was sent to cryptographers last month after sustained pressure from "pigeon fanciers," according to The New York Times. A historian at the Government Communications Headquarters says cryptographers probably won’t be able to crack the code unless they find out who the note was from, and where it was going.