The outwork, of which A is an enlarged plan, possesses all the features of a bastion, and was perhaps designed as such. It could hardly have been intended as a gateway; for, although the ditch is interrupted for a narrow space at c, the embankment is unbroken.

The transverse section of the wall, a b, demonstrates the artificial origin of the work, which it is not probable any one would be disposed to deny. The upheaved gravel upon the exterior side of the wall, wherever it is under cultivation, supports dwarfed and sickly maize; while on the inner side, the grain is luxuriant. This feature and its cause are indicated in the section.

This work, which was undoubtedly defensive, commands a large peninsula, two miles in circumference, formed by a singular bend in the river. About two hundred paces distant from this enclosure, in a southern direction, is the site of old Fort Dunlap, somewhat celebrated in the early history of the Miami valley. It was invested by the notorious Simon Girty, with a force of six hundred Indians, in 1791, without success. Some distance from the fort, and still further to the south, is a hill three hundred feet in altitude, upon the top of which are two mounds, measuring five and ten feet in height, respectively. They are composed of earth and stones, considerably burned.

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CHAPTER III. EARTHWORKS—SACRED ENCLOSURES.

The structure not less than the form and position of a large number of the Earthworks of the West, and especially of the Scioto valley, render it clear that they were erected for other than defensive purposes. The small dimensions of most of the circles, the occurrence of the ditch interior to the embankments, and the fact that many of them are completely commanded by adjacent heights, are some of the circumstances which may be mentioned as sustaining this conclusion.[36] We must seek, therefore, in the connection in which these works are found, and in the character of the mounds, if such there be within their walls, for the secret of their origin. And it may be observed, that it is here we discover evidences still more satisfactory and conclusive than are furnished by their small dimensions and the other circumstances above mentioned, that they were not intended for defence. Thus, when we find an enclosure containing a number of mounds, all of which it is capable of demonstration were religious in their purposes, or in some way connected with the superstitions of the people who built them, the conclusion is irresistible, that the enclosure itself was also deemed sacred, and thus set apart as “tabooed” or consecrated ground,—especially where it is obvious, at the first glance, that it possesses none of the requisites of a military work. But it is not to be concluded that those enclosures alone, which contain mounds of the description here named, were designed for sacred purposes. We have reason to believe that the religious system of the mound-builders, like that of the Aztecs, exercised among them a great, if not a controlling influence. Their government may have been, for aught we know, a government of the priesthood; one in which the priestly and civil functions were jointly exercised, and one sufficiently powerful to have secured in the Mississippi valley, as it did in Mexico, the erection of many of those vast monuments, which for ages will continue to challenge the wonder of men. There may have been certain superstitious ceremonies, having no connection with the purposes of the mounds, carried on in enclosures specially dedicated to them. The purposes of the minor enclosures within and connected with the great defensive work already described on the banks of the North fork of Paint creek, (Plate [X],) would scarcely admit of a doubt, even though the sacred mounds which they embrace were wanting. It is a conclusion which every day’s p048 investigation and observation has tended to confirm, that most, perhaps all, of the earthworks not manifestly defensive in their character, were in some way connected with the superstitious rites of the builders,—though in what precise manner, it is, and perhaps ever will be, impossible satisfactorily to determine.

The general character of these works has already been briefly indicated. They are mostly regular in their structure, and occupy the broad and level river bottoms, seldom occurring upon the table lands or where the surface of the ground is undulating or broken. They are usually square or circular in form; sometimes they are slightly elliptical. Occasionally we find them isolated, but more frequently in groups. The greater number of the circles are of small size, with a nearly uniform diameter of two hundred and fifty or three hundred feet, and invariably have the ditch interior to the wall. These have always a single gateway, opening oftenest to the east, though by no means observing a fixed rule in that respect. It frequently happens that they have one or more small mounds, of the class denominated sacrificial, within the walls. These small circles occasionally occur within larger works of a different character. Apart from these, numerous little circles, from thirty to fifty feet in diameter, are observed in the vicinity of large works. They consist of very slight embankments of earth, and have no entrances or passage ways. It has been suggested that these are the remains of ancient lodges or buildings. The accounts which we have of the traces left of the huts of the Mandans and other Indians, at their deserted villages, render this supposition not improbable. It sometimes happens that we find small circles embracing large mounds: these can hardly be regarded as of the same character with that numerous class already noticed.