is situated one completely isolated, and larger than any yet described. It is upward of thirty feet in height, about one hundred and fifty feet long, and upon the summit five feet wide. The form is oblong, resembling an immense grave; and a broad terrace or apron, after a descent of a few feet, spreads out itself on the side looking down upon the river. From the extensive view of the surrounding region and of the Mississippi commanded by the site of this mound, as well as its altitude, it is supposed to have been intended as a vidette or watch-tower by its builders. Upon its summit, not many years ago, was buried an Indian chief. He was a member of a deputation from a distant tribe to the agency in St. Louis; but, dying while there, his remains, agreeable to the custom of his tribe, were deposited on the most commanding spot that could be found. This custom accounts for the circumstance urged against the antiquity and artificial origin of these works, that the relics exhumed are found near the surface, and were deposited by the present race. But the distinction between the remains found near the surface and those in the depths of the soil is too palpable and too {127} notorious to require argument. From the _Big Mound_, as it is called, a _cordon_ of tumuli stretch away to the northwest for several miles along the bluffs parallel with the river, a noble view of which they command. They are most of them ten or twelve feet high; many clothed with forest-trees, and all of them supposed to be tombs. In removing two of them upon the grounds of Col. O'Fallon,[109] immense quantities of bones were exhumed. Similar mounds are to be found in almost every county in the state, and those in the vicinity of St. Louis are remarkable only for their magnitude and the regularity of their relative positions. It is evident, from these monuments of a former generation, that the natural advantages of the site upon which St. Louis now stands were not unappreciated long before it was pressed by the first European footstep.