The research of Dr. Timothy Pugh and his students has been supported by the National Science Foundation (BCS1219646, BCS-0917918, BCS-1037927, and BCS-1734036), Queens College of the City University of New York, the Research Foundation of the City University of New York, the Wenner-Gren Foundation, the Dumbarton Oaks Research Library and Collection, and the Foundation for the Advancement of Mesoamerican Studies, Inc. (FAMSI). I am grateful to the communities of Flores, San Miguel, Ixlú, and San Andres in Petén, Guatemala, the Centro Universitario del Petén, and the Instituto de Antropología e Historia for their help. I would also like to acknowledge all of the students who have worked on the project over the past 20 years for their hard work in the field and laboratory. I would also like to thank Prudence Rice and Don Rice who created this project and provided me with my initial support in Petén.