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Archæological Researches in the Great American Bottom.—The alluvial plain known as the "Great American Bottom," lying on the east side of the Mississippi, in Illinois, between Alton on the north and Chester on the south, and having an average width of eight or nine miles, is a region of wonderful fertility now, and the remains of ancient occupation there abundantly found prove that the mound-builders were not blind to the agricultural value of this remarkable tract. It was indeed "one of their greatest seats of empire," in the language of Mr. H. R. Howland, who has published, in the Bulletin of the Buffalo Society of Natural Sciences, an account of certain notable archaeological researches made in the "American Bottom." The mounds in this tract seem to have been divided into three principal groups: one lying within the limits of East St. Louis; another on the banks of Long Lake, twelve miles northward; and the third—one of the most extraordinary groups in this country—between Indian Lake and Cahokia Greek, some six miles from the Mississippi, and eight miles to the northeast of East St. Louis. In this last group is the great Cahokia Mound, by far the most important monument left by the mound-builders. The several groups are connected by lines of mounds at irregular intervals, and the total number is at least two hundred. Some two or three years ago Mr. Howland, having learned that one of the mounds in the second group was being removed to procure material for road-making, repaired to the spot and found the work of destruction already well advanced. In the mean time some interesting discoveries had been made. At the height of four or five feet above the base of the mound the workmen came upon a considerable deposit of human bones, and on the same level were discovered a number of valuable relics, many of them wrapped in a sort of matting. This was made of a coarse, cane-like fibre, simply woven without twisting, the flat strands measuring about one-eighth inch in