On the Mounds of the West. 247 
There is another description of mounds which should properly 
be here mentioned. 'Their purposes admit of no doubt. They 
consist of pyramidal structures, or “elevated squares,’ and are 
found almost invariably within enclosures. They are sometimes 
of large dimensions. 'Those at Marietta are fair examples of the 
class, and No. 1, Fig. 4, exhibits their structure and dimensions. 
Fig. 4. 
225.ft- 
ae measuring 160 feet in length, 601 k ber of the skel- 
he altar occupied one centre of the ellipse, the 7 ba en “ Mound 
eeding three feet in 
