SAC REDE N CLOSURES. 53 



described. It consists of a wall and outer ditch, which constitute three sides of a 

 parallelogram. The fourth side is protected by a natural bank or bluff, seventy 

 feet high, and so steep as to admit of no ascent, except at one point where it has 

 been gullied by the flow of water. 



The walls of this work are about six feet high by forty feet base ; the ditch five 

 feet deep by forty wide. The ditch upon the longer or eastern side is formed, 

 for two thirds of its length, by a " runway " or water-course. It is here from 

 eight to ten feet deep. The wall upon this side is fourteen hundred feet long. 

 The northern and southern walls are each ten hundred and fifty feet in length, and 

 placed at right angles to the first ; the southern extending to the very edge of 

 the bluff", the northern terminating within twenty-five feet of it. It is possible that a 

 fourth wall originally bounded the enclosure on the west, which has been destroyed 

 by the river, in its encroachments. There are gateways, each sixty feet wide, at the 

 centres of the northern and southern sides. Covering the northern gateway, and 

 two hundred feet interior to it, is an elevated square, two hundred and fifty feet 

 long by one hundred and fifty broad, and four feet high. It is ascended from the 

 ends by graded ways, thirty feet broad, and in all respects resembles the truncated 

 pyramids or " elevated squares" of the'Marietta Works (Plate XXVI). 



On the line of the southern embankment, and three hundred feet distant from 

 the main work, are singular parallel walls, eight hundred and seventy feet long and 

 seventy feet apart, connected at the ends. These walls have no ditch, and have 

 been partially obHtefated by the Chillicothe and Columbus turnpike, which passes 

 through them. In the timbered land, where they are undisturbed, they are between 

 two and three feet high. 



About one third of a mile south of the principal work, is a truncated pyramid, 



and a small circle. Fig. 9 : the former is one 

 hundred and twenty feet square at the base, 

 and nine feet in height; the latter is two 

 hundred and fifty feet in diameter, and has 

 an entrance from the south, thirty feet wide. 

 The sides of the pyramidal structure cor- 

 respond to the cardinal points. The circle 

 has a ditch interior to the embankment ; 

 and has also a broad embankment of about 

 the same height with the outer wall, interior to the ditch, upon the side opposite 

 the entrance. This feature, which is found in many of the smaller circles, is 

 illustrated by the plan, and by the section b a. This group is so disposed as to 

 command a fine view of the river terraces below it ; and the headland upon which 

 it is situated seems to have been artificially smoothed and rounded. The spot is 

 well chosen. The " elevated square " has been excavated, but was found to contain 

 no remains. Upon the edge of the table land, both above and below this pecuUar 

 group, there are various inconsiderable remains, consisting of small, low terraces, 

 and little mounds and circles. 



It is difficult to determine the character of this group of works. The principal 

 enclosure partakes of the nature of a defence ; but the broad gateways and the 



