When it was ?rst published in 1922, British censors believed that James Joyce's "Ulysses" was written in spy code. Though they may have been a tad paranoid, it is true that codes, enigmas, puzzles, and ciphers are pervasive in Joyce's text. In fact, protagonist Leopold Bloom's address, 7 Eccles Street, was originally the home of Joyce's friend J.F. Byrne, a pioneering cryptographer who invented a machine for producing a supposedly "unbreakable" cipher. In "Deciphering Ulysses" visitors are invited to learn about the famous novel as they decode Leopold Bloom's clandestine letters, explore his recreated desk drawer, read what the United States Court of Appeals had to say about Joyce's enigmas, and glimpse an early reader's arsenal of maps and charts for understanding the text.