persistent, and that a language which is dependent for its existence upon oral tradition is not easily modified[775]." A test case is the Delaware (Leni Lenape), an Algonquian tongue which, judging from the specimens collected by Th. Campanius about 1645, has undergone but slight modification during the last 250 years. In this connection the important point to be noticed is the fact that some of the stock languages have an immense range, while others are crowded together in indescribable confusion in rugged upland valleys, or about river estuaries, or in the recesses of trackless woodlands, and this strangely irregular distribution prevails in all the main divisions of the continent. Thus of Powell's 58 linguistic families in North America as many as 40 are restricted to the relatively narrow strip of coastland between the Rocky Mountains and the Pacific, ten are dotted round the Gulf of Mexico from Florida to the Rio Grande, and two disposed round the Gulf of California, while nearly all the rest of the land--some six million square miles--is occupied by the six widely diffused Eskimauan, Athapascan, Algonquian, Iroquoian, Siouan, and Shoshonian families. The same phenomenon is presented by Central and South America, where less than a dozen stock languages--Opatan, Nahuatlan, Huastecan, Chorotegan, Quichuan, Arawakan, Gesan (Tapuyan), Tupi-Guaranian, Cariban--are spread over millions of square miles, while many scores of others are restricted to extremely narrow areas. Here the crowding is largely determined, as in Caucasia, by the altitude (Andes in Colombia, Ecuador, Peru, and Bolivia; Sierras in Mexico). It is strongly held by many American ethnologists that the various cultures of America are autochthonous, nothing being borrowed from the Old World. J. W. Powell[776], who rendered such inestimable services to American anthropology, affirmed that "the aboriginal peoples of America cannot be allied preferentially to any one branch of the human race in the Old World"; that "there is no evidence that any of the arts of the American Indians were borrowed from the Orient"; that "the industrial arts of America were born in America, America was inhabited by tribes at the time of the beginning of industrial arts. They left the Old World before they had learned to make knives, spear and arrowheads, or at least when they knew the art only in its crudest state. Thus primitive man has been here ever since the invention of the stone knife and the stone hammer." He further contended that "the American Indian did not derive his forms of government, his industrial or decorative arts, his languages, or his mythological opinions from the Old World, but developed them in the New"; and that "in the demotic characteristics of the American Indians, all that is common to tribes of the Orient is universal, all that distinguishes one group of tribes from another in America distinguishes them from all other tribes of the world."