Cabins in Fulton County (Fout’s Village) and at Cahokia were rectangular in floor plan but wall posts were probably bent over to be joined with corresponding opposite members to form an arched or vaulted roof, the precursor perhaps of the “barrel-shaped” Illini cabins reported by French explorers. Floors were sunk somewhat below the ground level. Remains of cabins with circular floors occur also at Cahokia and in Fulton County. [Illustration: Fig. 28. Petroglyphs from southern Illinois sites probably made by Middle Mississippian peoples. All figures are hollowed out or _intaglio_. (Photographs by Irvin Peithmann.)] [Illustration: Back wall of rock shelter near Gorham, Illinois.] [Illustration: Figure of buffalo calf painted yellow over entire depressed area. The outlines were chalked in for the purpose of photographing.] Walls and wall posts of the Fulton County cabins appear in some instances to be formed of bundles of small branches or cane set in trenches possibly a foot deep. There is no evidence of the wattle-and-daub structure. Walls may have been covered with mats, or with rectangles of bark. Roofs were probably thatched. Possibly the Cahokia subculture peoples constituted a single tribe, a small nation, or a confederation of tribes. At its most powerful period, the Cahokia settlement was perhaps the capital and religious center. The region south of a line joining the mouths of the Kaskaskia and Wabash rivers at one time probably belonged to another tribe or subtribe whose chief village was the Kincaid community in Pope and Massac counties and who, linguistically and culturally, were closely related to peoples in Tennessee and Kentucky and at the Angel site in Indiana. Archaeologically speaking, the Middle Mississippi contrasts sharply with the Hopewellian culture. Certain artifacts are readily distinguishable and easily identified with the craftsman’s cultures. Actually the Mississippians differ from the Hopewellians chiefly in having substantial cabins, athletic games and the bow and arrow. Remains of Hopewellian dwellings are rare, but the three or four found up to now are characterized by round or oval floor plans outlined with post holes of three to four inches in diameter. These seem to indicate hemispherical wigwams. No further evidence of wall or roof structure has been recovered. The rarity of these dwellings certainly suggests a less permanent dwelling than the Mississippi cabin. However, it will be remembered that some peoples pattern their tombs upon their dwellings. The upper caste Hopewellians built rectangular burial chambers which were walled up with logs laid one on another and roofed over with half-logs or bark. Similar log house surface structures would seldom leave discernible remains on decay. It is possible, though by no means certain, that the Hopewellians of highest caste, and perhaps of the other castes, built log cabins for dwellings.