- Biliteral Cypher of Sir Francis Bacon
- Studies in the Biliteral Cipher of Francis Bacon
- The Tragedy of Anne Boleyn: A Drama in Cipher Found in the Works of Sir Francis Bacon
- Biliteral Cypher of Francis Bacon: Replies to Criticisms
- Concerning the Bi-literal Cypher of Francis Bacon, Discovered in his Works. Pros and Cons of the Controversy