The Iroquois were sedentary and agricultural, and depended on the chase for only a small part of their existence. The northern tribes were especially noted for their skill in building fortifications and houses. Their so-called castles were solid wooden structures with platforms running around the top on the inside. From the platforms stones and other missiles could be hurled down upon besiegers. According to our standards such dwellings were very primitive, but they were almost as great an advance upon the brush piles of the Utes as our skyscrapers are upon them. Farther south in the Carolinas, the Cherokees, another Iroquoian tribe, stand out prominently by reason of their unusual mental ability. Under the influence of the white man, the Cherokees were the first to adopt a constitutional form of government embodied in a code of laws written in their own language. Their language was reduced to writing by means of an alphabet which one of their number named Sequoya had devised. Sequoya and other leaders, however, may not have been pure Indians, for by that time much white blood had been mixed with the tribe. Yet even before the coming of the white man the Cherokees were apparently more advanced in agriculture than the Iroquois were, but less advanced in their form of government, in their treatment of women, and in many other respects. In general, as we go from north to south in the region of deciduous forests, we find that among the early Indians agriculture became more and more important and the people more sedentary, though not always more progressive in other ways. The Catawbas, for instance, in South Carolina were sedentary agriculturists and seem to have differed little in general customs from their neighbors. Their men were brave and honest but lacking in energy. In the Muskhogean family of Indians, comprising the Creeks, Choctaws, Chickasaws, and Seminoles, who occupied the Gulf States from Georgia to Mississippi, all the tribes were agricultural and sedentary and occupied villages of substantial houses. The towns near the tribal frontiers were usually palisaded, but those more remote from invasion were unprotected. All these Indians were brave but not warlike in the violent fashion of the Five Nations. The Choctaws would fight only in self-defense, it was said, but the Creeks and especially the Chickasaws were more aggressive. In their government these Muskhogean tribes appear to have attained a position corresponding to their somewhat advanced culture in other respects. Yet their confederacies were loose and flimsy compared with that of the Five Nations. Another phase of the life of the tribes in the southern part of the region of deciduous forests is illustrated by the Natchez of Mississippi. These people were strictly sedentary and depended chiefly upon agriculture for a livelihood. They possessed considerable skill in the arts. For instance, they wove a cloth from the inner bark of the mulberry tree and made excellent pottery.