Cryptanalysis of the Enigma Bletchley Park to describe the network that used the same Enigma setting sheets. Initially these were recorded using coloured pencils and were given the names "red", "light blue" etc., and later the names of birds such as "kestrel". During World War II the settings for most networks lasted for 24 hours, although towards the end of the war, some were changed more frequently. The sheets had columns specifying, for each day of the month, the rotors to be used and their positions, the ring positions and the plugboard connections. For security, the dates were in reverse chronological order down the
The Man That Was Used Up of the day, exaggerating the technique to the point of being inane. The opening epigraph to the story is from "Le Cid" by Pierre Corneille and translates to: The story bears a resemblance to "A Beautiful Young Nymph Going to Bed", a satiric poem by Jonathan Swift from 1731. Both works depict grotesquely artificial bodies: Swift's poem features a young woman preparing for bed by deconstructing, while Poe's story features an old man reconstructing himself to begin his day. The Man That Was Used Up "The Man That Was Used Up", sometimes subtitled "A Tale of the Late Bugaboo and