This is a report of archaeological investigations conducted at Cahokia from 1921 to 1927 by Warren Moorehead, who confirmed that the mounds were built by indigenous people and who worked to assure preservation of the site. It includes his 1929 report along with portions of two preliminary reports.

This edition of Moorehead's excavations at Cahokia provides a comprehensive collection of Moorehead's investigations of the nation's largest prehistoric mound center. This book is a report of archaeological investigations conducted at Cahokia from 1921 to 1927 by Warren K. Moorehead, who confirmed that the mounds were built by indigenous peoples and who worked to assure preservation of the site. The volume includes Moorehead's final 1929 report along with portions of two preliminary reports, covering both Cahokia and several surrounding mound groups.