Dorabella Cipher

This cipher was an enciphered letter from Edward Elgar to Miss Dora Penny. This letter contained a cipher of 87 characters and is made of an alphabet of 24 characters. These symbols range from 1-3 semi-circles that are pointed in any of eight directions. Many attempts to break this cipher have proved futile. The amount of characters would suggest that it would be a simple single substitution cipher but every attempt to break the cipher in this manner were unsuccessful. Even Miss Dora Penny was never able to decipher this letter.