Undoubtedly, the centre of the distribution of copper was the Lake Superior region, which showed that there was a diffusion of cultures from this centre at this early period. They made some progress in agriculture, cultivating maize and tobacco. Apparently their commerce with surrounding tribes was great, which no doubt gave them a variety of means of life. The pottery, judging from specimens that have been preserved, was inferior to that of the Mexicans or the Arizona Indians, but, nevertheless, in the lower Mississippi fine collections of pottery showing beautiful lines and a large number of designs were found. It fills one with wonder that a tribe of such power should have begun the arts of civilization and developed a powerful organization, and then have been so suddenly destroyed--why or how is not known. In all probability it is the old story of a sedentary group being destroyed by the more hardy, savage, and warlike conquerors. _Other Types of Indian Life_.--While the great centres of culture were found in Peru, Central America, Mexico, southwest United States, and the Mississippi valley, there were other cultures of a less pronounced nature worthy of mention. On the Pacific coast, in the region around Santa Barbara, are the relics of a very ancient tribe of Indians who had developed some skill in the making of pottery and exhibit other forms of industrial life. Recently an ancient skeleton has been discovered which seems to indicate a life of great antiquity. Nevertheless, it is a lower state of civilization than those of the larger centres already mentioned. Yet it is worthy of note that there was here started a people who had adopted village habits and attained a considerable degree of progress. Probably they were contemporary with other people of the most ancient civilizations of America. So far as the advancement of government is concerned, the Iroquois Indians of Canada and New York showed considerable advancement. As represented by Mr. Lewis H. Morgan, who made a careful study of the Iroquois, their tribal divisions and their federation of tribes show an advancement along {200} governmental lines extending beyond the mere family or tribal life. Their social order showed civil progress, and their industrial arts, in agriculture especially, were notable.