Of necessity in attempting a summary of the archaeology of Illinois and adjacent areas, the writer has had to lean heavily on the field work and reports of the many anthropologists who have contributed so much to the present understanding of the American Indian in the United States. To this invaluable source material and to these able scientists the indebtedness of the writer is acknowledged to be very great indeed. In the compass of a work of this type it is impossible to name them or give them credit for original or similar views, nor is it practicable to include in the bibliography all the publications used. Acknowledgment of assistance is made especially to Georg K. Neumann, Joseph R. Caldwell and Melvin L. Fowler, Milton D. Thompson, Ruth Kerr, Nora Deuel and Orvetta Robinson for reading and discussing the manuscript from various viewpoints, to Dr. James B. Griffin for helpful information on the dates of sites and of archaeological data, to Irvin Peithmann, Southern Illinois University, for photographs furnished, for information on sites he had discovered and the privilege of visiting them in his company, to George Langford for photographs and data regarding the Fisher site, to Charles Hodge for all photographs reproduced not otherwise credited, and to Jerry Connolly, Bettye Broyles, Barbara Parmalee and Jeanne McCarty for their excellent drawings. Without all this considerable and valuable aid the publication could not have been completed. TABLE II. RADIOCARBON DATES[1] CULTURAL UNIT C14 DATE SITE STATE COUNTY