The Dorabella Cipher is a cryptographic message created by the British composer Edward Elgar in 1897. The cipher consists of 87 unique symbols and was sent in a letter to a close friend, Dora Penny (hence the name "Dorabella"). The letter was written in a playful and whimsical manner, and the symbols in the cipher were intended to convey a secret message. Despite various attempts by cryptographers and enthusiasts over the years, the Dorabella Cipher remains unsolved.
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