The Mound Builders.
In the long ago a strange people lived in the United States. They left no books to tell their story, but here and there through the country mounds of earth which they built are still standing. Some of them are shaped like birds with wings outspread, others have the forms of fishes, snakes, and human beings. Still other mounds show that they must have been used as altars upon which sacrifices were burned, and others, again, contain tools, dishes, idols and ornaments. Some of the ornaments and dishes were decorated with the finest carvings. Heads of people, frogs and birds are still to be seen on the pipes that have been preserved in the mounds all these years. Tools have been found to show the mound-builders, as we call these people, knew how to work metal, and other things tell the story that the men of that long ago were wise in many ways and could not have been savages. There are earthworks near some of the mounds that seem to have been built as forts, so they probably fought in wars. Yet we can only guess as to their life, for no one knows their history.