Ohio Mounds: Earthwork Near Hamilton Ohio

      Among the works remarkable as possessing double walls, is the one here presented. It is situated on the Great Miami river, four miles south-west of the town of Hamilton, Butler county, Ohio. The plan obviates the necessity of a detailed description. The outer line of defence consists of a simple embankment five feet high, with an exterior ditch four feet deep. It has a single gateway fifteen feet wide. There are apparent gateways at a a, but the ditch only is interrupted.
Interior to this line of embankment, is another of less dimensions, having also but one opening. At b is a large broad mound, over which, and somewhat below the summit on the outer side, the inner line of embankment is carried. The ditch also continues uninterruptedly over the mound, which is thirty feet high. From its summit, a view of the entire work and surrounding country is commanded. Another mound, ten feet high, occurs at the point indicated in the plan. It is composed of stone and gravel, apparently taken from the river, and probably belongs to the class of mounds denominated "sacrificial,"—the characteristics of which are explained in another chapter. At c, the outer wall appears to have formerly extended down to a lower level; but it has been much obliterated by the washing of the bank. The natural banks, on the side towards the river and next to Big Run, are inaccessibly steep, and between sixty and seventy feet high.
The area, embraced within the exterior lines, is a trifle less than eighteen acres. The defensive character of this work can hardly be doubted. It has been suggested that the large mound, over which the inner wall is carried, was designed as a look-out, or alarm post. This may not have been its primary, but it is not impossible that such was its secondary purpose.