"Covering almost fourteen square kilometers in Illinois, Cahokia Mounds State Historic Site is the largest prehistoric mound center in North America. Moorehead's archaeological investigations conducted at Cahokia from 1921 to 1927 confirmed that the mounds were built by indigenous peoples.". "Moorehead's work represented important excavations at a time when little other similar work was being done in the Midwest. The reissue of his findings on the 75th anniversary of the site's establishment as a State Park gives us a glimpse into an important archaeological effort and helps us better appreciate the prehistoric legacy that he helped preserve."--BOOK JACKET.