Cryptography: Or How To Write In Cipher (1870) by Hazell is a comprehensive guide to the art of secret writing. The book covers a wide range of topics related to cryptography, including the history of the field, different types of ciphers, and methods for breaking them. The author provides detailed instructions on how to create and use various types of ciphers, such as substitution ciphers, transposition ciphers, and polyalphabetic ciphers. The book...