Most Popular Books
- The Landa Alphabet: A Spanish Fabrication
- Yucatan and Mexico
- Vortag über den mexicanishen Calender-Stein.
- Mexican Copper Tools: The Use of Copper by the Mexicans Before the Conquest, and the Katunes of Maya History, a Chapter in the Early History of Central America, with Special Reference to the Pio Perez
- The Katunes of Maya History. a Chapter in the Early Chronology of Central America, with Special Reference to the Pio Perez Manuscript