- The Numeration, Calendar Systems and Astronomical Knowledge of the Mayas
- Connection of Francis Bacon with the First Folio of Shakespeare's Plays and with the Books on Cipher of His Time
- Mexican and Central American Antiquities, Calendar Systems, and History: Twenty-Four Papers
- A Suggestive Maya Inscription
- Was the Beginning Day of the Maya Month Numbered Zero (or Twenty) or One? - Primary Source Edition