OHIO. 



461 



cle," the " Octagon," and " Square," made by Mr. J. D. Middletou in 

 1888, are inserted here. 



In measuring the circles chords of equal length were used, the sta- 

 tions being on top of the wall and always as near the middle as could 

 be ascertained by measurement and judgment and the stakes all set 

 before the bearings were taken. The course of each chord was taken. 

 In measuring the Octagon, the middle lines of the wall were followed 

 and the corners established where the lines cross each other. 



FAIR GROUND CIRCLE. 



This is the large circle (see PI. xxxi) situated in the southern ex- 

 tremity of the group and marked E on PI. xxv of Ancient Monuments, 

 and has received the above name from the fact that it embraces within 

 its circuit the fair grounds of the Licking County Agricultural Society. 

 It is undoubtedly one of the best preserved ancient monuments of our 

 country; it is uninjured by the plow and trees of the original forest 

 are still .standing on it. The ditch has been but slightly filled by the 

 wash of the many years which have passed since its abandonment. 

 The wall varies in width from .3.'* to .55 feet and in height from 5 to 14 

 feet. The ditch varies in width from 28 to 41 feet and in depth from 8 

 to 13 feet. 



The following are the notes of the survey, commencing at station 1, 

 in the gateway : 



