" "Lizzy," cried her mother, "remember where you are, and do not run on in the wild manner that you are suffered to do at home." "I did not know before," continued Bingley immediately, "that you were a studier of character. It must be an amusing study." "Yes, but intricate characters are the most amusing. They have at least that advantage." "The country," said Darcy, "can in general supply but a few subjects for such a study. In a country neighbourhood you move in a very confined and unvarying society." "But people themselves alter so much, that there is something new to be observed in them for ever." "Yes, indeed," cried Mrs. Bennet, offended by his manner of mentioning a country neighbourhood. "I assure you there is quite as much of that going on in the country as in town." Everybody was surprised, and Darcy, after looking at her for a moment, turned silently away. Mrs. Bennet, who fancied she had gained a complete victory over him, continued her triumph.
Mess 8 C W V age 5 X . H J Z . Now, since all these messages were enciphered with the same keytext, all the hidden plaintext letters in the first column were enciphered by the same keyletter, which means that they have been enciphered in the same cipher-text alphabet. Consequently, all the plaintext a's will have the same ciphertext equivalent, all the plaintext b's will likewise have their own unvarying ciphertext equivalent, and so on. Likewise, each ciphertext letter represents only one plaintext letter. This holds true for each column. Each column may thus be attacked as an ordinary monalpha-betic substitution, just as Kasiski did with identically enciphered letters in a periodic polyalphabetic. In cases where the key does not start over again with each message, the cryptanalyst may line up repetitions in several messages to obtain a proper superimposition.
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