S A C li E D ENCLOSURES. 63 



mounds ; sometimes they are connected with long parallel lines of embankments, 

 of which more particular mention is elsewhere made. 



This group occupies a beautiful plain forming the third terrace, upon the edge 

 of which, at D, is a mound, formerly of considerable dimensions, but now much 

 reduced in altitude. Upon the opposite bank of the creek, and occupying the 

 corresponding terrace, are other works, consisting of a small circle and a number 

 of small mounds. 



PLATE XXII. No. 2. 



• BLACKWATER GROUP, ROSS COUNTY, OHIO. 



This group, which very much resembles that last described, is situated on the 

 right bank of the Scioto river, eight miles above Chillicothe, near the Columbus 

 road. It is specially remarkable for its singular parallels, A and B of the plan. 

 Each of these is seven hundred and fifty feet long by sixty broad, measuring from 

 centre to centre of the embankments. They are in cleared ground, which has been 

 cultivated for more than twenty years ; consequently the walls are much reduced, 

 being now scarcely two feet in height. A gateway opens into the southern parallel, 

 from the east. A corresponding opening may have existed in the other parallel, 

 though it is impossible to discern it now. The ground embraced in the semi- 

 circular works C and D is reduced several feet below the level of the plain on 

 which they are located. The mounds belonging to this group have never been 

 investigated ; hence their character is undetermined. The group is introduced in 

 this connection, on account of its resemblance to the one just described. It is 

 just to conclude that both were erected for a common or analogous purpose. 



PLATE XXIII. No. 1.* 



OTJNLAP'S WORKS, ROSS COUNTY, OHIO. 



This work, situated on the right bank of the Scioto river, six miles above Chil- 

 licothe, presents some remarkable features. It is rhomboidal in figure, with an 

 avenue eleven hundred and thirty feet long extending to the south-east, and also a 



Tndicatpcl by A. in Map, Plate TT. 



