amiable gentleman lost no opportunity during our stay at St. Louis to make our residence there agreeable to us. Near the site selected for his house is a mineral spring, whose {55} waters are strongly impregnated with sulphuretted hydrogen gas. Cattle and horses, which range here throughout the season, prefer the waters of this spring to those of the creek in whose bed it rises, and may be seen daily coming in great numbers, from distant parts of the prairie, to drink of it. Tumuli, and other remains of the labours of nations of Indians that inhabited this region many ages since, are remarkably numerous about St. Louis. Those tumuli immediately northward of the town, and within a short distance of it, are twenty-seven in number, of various forms and magnitudes, arranged nearly in a line from north to south. The common form is an oblong square, and they all stand on the second bank of the river. The statement given below of their forms, magnitudes, and relative positions, is the result of actual admeasurement taken with care, and with as much accuracy as their present indefinite boundaries, together with the dense growth of underwood, covering their surface, and tending to beguile and obstruct the vision of the observer, will admit. It seems probable these piles of earth were raised as cemeteries, or they may have supported altars for religious ceremonies. We cannot conceive any useful purpose to which they can have been applicable in war, unless as elevated stations from which to observe the motions of an approaching enemy; but for this purpose a single mound would have been sufficient, and the place chosen would probably have been different. Nothing like a ditch, or an embankment, is to be seen about any part of these works.[083]