102 
i8oo feet broad, with one corner somewhat rounded. A semi- 
circular embankment, within the larger enclosure, and sur- 
rounding the Mounds Nos. 5 to 8, is 2000 feet in circumference. 
The embankments measure together nearly three miles in length, 
and the works, including the mounds, must have necessitated 
the excavation and removal of not less than three millions of 
cubic feet of earth. 
Squier and Davis class Clark's Work" as a work of defence, 
although they admit that it differs, in position and some other 
respects, from the other entrenched hills which- have come 
under their notice. It is by no means proved, however, that 
the mound-builders converted this position into a defensive 
post ; this may have been done by some later tribe, who merely 
availed themselves of the advantageous configuration of the 
ground. For instance, the level of the soil within the semi- 
circular enclosure is elevated above the surrounding ground, and 
the three long mounds within it are united at their bases, forming 
a continuous elevation, thirty feet in height and five hundred 
feet in length. Such a position would be seized upon at once 
as a ready-made work of defence, requiring merely the addition 
of the slight circumvallation and ditch by which it is now 
surrounded. All the other natural advantages of the position 
were secured in constructing the outer work, and no doubt the 
mounds were merely utilised as hills. The way in which they are 
scattered, both within and without the entrenchment, appears 
to confirm this view. The mounds may have been, and pro- 
bably were, constructed at an earlier period than the entrench- 
ments, and perhaps by a totally different people. Squier and 
Davis, however, regard Clark's Work" as a fortified town or 
city of the ancient mound-builders. 
Mound No. i, ''Clark's Work." 
This mound, although very rich in relics, was one of the 
smallest examined. It was not more than three feet in height. 
No "altar" was found in it. The relics appear to have been 
placed upon the surface of the soil, which was much burnt, 
over a space about fifteen feet in breadth. A bed of earth, about 
afoot in depth, was heaped over the relics. Upon this a layer of 
small stones was placed ; these stones were covered by a layer 
of earth about two feet in thickness. In Mound No. i some 
stone pipes, Nos. 12 and 13, Case E 6, were found, the bowls of 
which are in the form of coiled serpents. These were carefully 
