



PREFACE 















This report is based on three weeks field work. Itis 
increasingly apparent that this is too short a time to get to the 
bottom of even those problems which require merely the collection of 
data (as distinguished from real research). Nevertheless the frame- 
work of the report is that suitable for a more exhaustive survey. 
Such a framework has been deliberately chosen in the hope that some 
competent persona institution will see fit to fill in the missing 
detail. The Institute will gladly co-operate to this end. 
Several regions have been left uncovered: (1) The region 
of the lower Rock River and Upper Mississippi; (2) The middle Missis- 
ippi from Quincy to Alton; (3) The Kankakee country; (4) The Galesburg 
region; (5) The lower Wabash; (6) The Vandalia region, 
Wherever these omissions have been felt to cast a doubt 
on the conclusions reached, that fact is pointed out and the need 

for additional work emphasized. 
