﻿NO. 15 



SMITHSONIAN EXPLORATIONS, I92I 



lOI 



Fir.. 105 — Conical mound on summit of the I)luff northeast of Cahokia. 



Fig. 106. — Looking northward from near the road leading to I 

 showing the eastern border of the lowlands which extend westward lu tlic 

 ^lississippi. 



