Archaeological Investigations in Jefferson County, Mo. 197 
(32). These were mixed with the Herculaneum Cord Rough- 
ened sherds and were found at levels deeper than the Imperial 
Plain sherds. Short broad projectile points and narrower points 
with contracting stems were found. A small pocket with sherds 
and a point was found close to the perpendicular side of the 
rock platform and near the bottom of the cultural deposits. The 
sherds comprised a large portion of a small thick walled pot. 
They were of the Rouggly Uneven Grit type of ware and the 
point was similar to the projectile points notched near the base 
and found with the Black Sand component in Illinois. 
Percentage studies of the pottery reveal a convincing change 
in proportions of ware types from the deep levels to the surface 
of J83, J87 and J830. Imperial Plain ware is completely absent 
in the lower levels and the Plattin Clay Tempered ware is 
found mixed with Herculaneum Cord Roughened at deeper levels 
than the Imperial Plain, giving possibility as at J83 that the 
Plattin Clay Tempered ware is older in some of the rock shelters 
than the Imperial Plain.1 
1As this publication goes to press we must report highly eroded 
fragments of Imperial sherds with Herculaneum sherds at the 
base of later rock shelter fill at Js7 in secondary position in the 
center of a trough shaped gully area at depths of 125 centimeters 
or over four feet. Our exhaustive study of this rock shelter forces 
dle occupation in which were found the Hidden Valley Crushed 
Quartz ware together with long side notched points and concave 
based points. 
