There are thirty-three gateways or openings in the wall, most of them very narrow, not exceeding fifteen or twenty feet in width at the top: only eleven of these have corresponding causeways across the ditch. They occur at irregular intervals; and some of them appear to have been rather designed to let off the water which might otherwise accumulate in the ditch, than to serve as places of egress or ingress. Indeed, most of them cannot be supposed to have been used for the last named purposes, inasmuch as they occur upon the very steepest points of the hill, and where approach is almost impossible. At the northern and southern spurs or angles of the hill, the gateways are widest, and the parapet curves slightly outwards. The ditch is interrupted at these points.
There are three depressions or ponds within the enclosure; the largest of these, g, has a well-defined artificial embankment on its lower side, which has recently been cut through, and the water principally drawn off. When full, the water must have covered very nearly an acre. Bog-clumps are growing around its edges, and it is free from trees. It does not seem to have any perennial sources of supply. There are several other small circular depressions, a number of which occur together at the bluff A; there are also traces of other excavations, not clearly defined, at various points on the hill.
An inspection of the plan of the work, shows that it is naturally divided into three parts; that at A being, in many respects, the most remarkable. It is connected with the main body of the work by a narrow ridge but one hundred feet wide, and terminates at a bold, bluff ledge, the top of which is thirty feet above the bottom of the trench, and twenty feet above the wall. This bluff is two hundred feet wide. It is altogether the most prominent point of the hill, and commands a wide extent of country. Here are strong traces of the action of fire on the rocks and stones; though whether remote or recent, it is not easy to determine. The connection between the two principal divisions of the work is also narrow, being barely two hundred and fifty feet in width.
Such are the more striking features of this interesting work. Considered in a military point of view, as a work of defence, it is well chosen, well guarded, and, with an adequate force, impregnable to any mode of attack practised by a rude, or semi-civilized people. As a natural stronghold, it has few equals; and the p016 degree of skill displayed and the amount of labor expended in constructing its artificial defences, challenge our admiration, and excite our surprise. With all the facilities and numerous mechanical appliances of the present day, the construction of a work of this magnitude would be no insignificant undertaking. And when we reflect how comparatively rude, at the best, must have been the means at the command of the people who raised this monument, we are prepared to estimate the value which they placed upon the objects sought in its erection, and also to form some conclusion respecting the number and character of the people themselves.
It is quite unnecessary to recapitulate the features which give to this the character of a military work; for they are too obvious to escape attention. The angles of the hill form natural bastions, enfilading the wall. The position of the wall, the structure of the ditch, the peculiarities of the gateways where ascent is practicable, the greater height of the wall where the declivity of the hill is least abrupt, the reservoirs of water, the look-out or citadel, all go to sustain the conclusion.
The evidence of antiquity afforded by the aspect of the forest, is worthy of more than a passing notice. Actual examination showed the existence of not far from two hundred annual rings or layers to the foot, in the large chestnut-tree already mentioned, now standing upon the entrenchments. This would give nearly six hundred years as the age of the tree. If to this we add the probable period intervening from the time of the building of the work to its abandonment, and the subsequent period up to its invasion by the forest, we are led irresistibly to the conclusion, that it has an antiquity of at least one thousand years.[13] But when we notice, all around us, the crumbling trunks of trees half hidden in the accumulating soil, we are induced to fix upon an antiquity still more remote.
It is worthy of note, that this work is in a broken country, with no other remains, except perhaps a few small, scattered mounds, in its vicinity. The nearest monuments of magnitude are in the Paint creek valley, sixteen miles distant, from which it is separated by elevated ridges. Lower down, on Brush creek, towards its junction with the Ohio, are some works; but none of importance occur within twelve miles in that direction.
[♠] VI. Fortified Hill, Butler Co. Ohio, 3 Mile S. W. of the town of Hamilton.
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