A naval travel narrative records journeys across North America and Central America, combining first-hand descriptions of indigenous communities with archaeological observations of burial mounds, fortified enclosures, and temple complexes. The author documents prehistoric earthworks in Ohio and the Mississippi valley, Indian reservations and customs, and geological contexts such as glacial drift and prairies; then turns to Guatemala, Mexico, and Yucatan to describe pyramids, temples, sculptural reliefs, and architectural ornament at sites like Palenque and Uxmal. Interwoven are discussions of religious practices, hieroglyphic puzzles, excavation finds, and hypotheses about the origins and development of pre-Columbian civilizations.