- The Lenâpé and Their Legends; With the Complete Text and Symbols of the Walam Olum, a New Translation, and an Inquiry Into Its Authenticity
- Nagualism: A Study in Native American Folk-Lore and History...
- A Primer of Mayan Hieroglyphics
- A Lenâpé-English dictionary. From an anonymous ms. in the archives of the Moravian Church at Bethlehem, Pa.;
- The American Race