A 16th century English mathematician, astronomer, navigator and alchemist, John Dee was a consultant to Queen Elizabeth I. In his encrypted communications to the Queen, he signed himself with a certain cipher. A majority of scholars and cryptologists have said it to symbolise his own two eyes as well as indicating that he was the secret eyes of the Queen. During the second World War, a British Naval Intelligence officer, chose this signature as an alias for a fictional character.
Who is this character, and what symbol am I talking about?