Mr. Smith on the Stream Works of Pent ow an. 409 



Carrion Stream Work, 1807. 



Strata. Feet. In. 



No. I. Mud and sand 7 — 



2. Granite gravel intermixed with small pieces resembling charcoal ; 



and a few shells 4 — 



3. Fine gravel, mud and shells 12 — 



About this depth are several irregular strata of oysters, about 



4 or 5 feet in thickness, extending irregularly to within 4 or 



5 feet of the tin ground. 



4. Closer mud intermixed with shells 19 — 



In this stratum have been found several branches and trunks of 

 trees, some of which had evident marks of being cut with an 

 axe or other sharp instrument. Horns and bones of slags, 

 likewise human skulls. 



5. Tin Ground, varying in depth from 1 to 6 feet. 



Tregoney Stream Work, 1S07. 



Strata. Feet. In. 



No. 1. Granite gravel with layers of mud 11 6 



2. Black mud with a few shells 15 — 



N.B. In this stratum were found a cow's horn, 3 inches \ dia- 

 meter, and 1 foot 1 inch in circumference ; and several stags 

 horns. 



3. Tin Ground; average depth 2 feet. 



