Those were the Mound Builders, whose works are said to be two or three thousand years old, though we cannot be very sure of that. There are some who think that the mounds are only a few hundred years old, and that their builders were the race of red men whom the white men found here. One may think very much as one likes, and I like to think that the Mound Builders were a very ancient people, who vanished many ages before the Indians came here. They could not have been savages, for the region where they dwelt could not have fed savages enough to heap up the multitude of their mounds. Each wild man needs fifty thousand acres to live upon, as the wild man lives by hunting and fishing; in the whole Ohio country, the earliest white adventurers found only two or three thousand Indians at the most; and the people who built those forts and temples and tombs, and shaped from the earth the mighty images of their strange bird-gods and reptile-gods, could have lived only by tilling the soil. Their mounds are found everywhere in the west between the Alleghany Mountains and the Mississippi River, but they are found mostly in Ohio, where their farms and gardens once bordered the Muskingum, the Scioto, the two Miamis, and our other large streams, which they probably used as highways to the rivers of the southwest. Their forts were earthworks, but they were skillfully planned, with a knowledge which no savage race has shown. They were real strongholds, and they are so large that some of them inclose hundreds of acres within walls of earth which still rise ten and twelve feet from the ground. They are on a far grander scale than the supposed temples or religious works; and there are more of them than of all the other ruins, except the small detached mounds, which are almost numberless. These, from the charred bones found among the ashes in them, are known to be tombs, and they were probably the sepulchers of the common people, whose bodies were burned. The large mounds are heaped above walled chambers, and in these were platforms, supposed to have been altars, and whole skeletons, supposed to be the skeletons of priests buried there. The priests are supposed to have been the chiefs of the people, and to have ruled them through their superstitions; but there is nothing to prove this, for their laws were never put in written words or any other sign of speech. In some of the mounds little figures of burnt clay have been found, which may be idols, and pieces of ancient pottery, which may be fragments of sacred vessels, and small plates of copper, with marks or scratches on them, which may be letters. Some antiquarians have tried to read these letters, if they are letters, and to make sense out of them, but no seeker after true Ohio stories can trust their interpretations.