Box four contains research related to the Plains Village era site, Steed-Kisker. Since ties to Cahokia were theorized, some tie-in for Cahokia materials is possible within the materials. Given that this site is located near Kansas City, other research materials that pertain to that locality are also housed in box four, including a manuscript of a paper on Mississippian Developments in the Kansas City Locality, infrared aerial photographs of the area, and other broader topics such as Mississippian pottery and Missourian archaeology sites. Box four also includes materials related to the Mesoamerica series.