The Mobilian trade jargon was not unique of its kind. In America, as in other parts of the world, the common necessities of intercommunication have resulted in the formation of several such mongrel dialects, prevailing, sometimes over wide areas. In some cases, also, the language of a predominant tribe serves as the common medium for all the tribes of a particular region. In South America we find the lingoa geral, based upon the Tupi' language, understood for everyday purposes by all the tribes of the immense central region from Guiana to Paraguay, including almost the whole Amazon basin. On the northwest coast we find the well-known "Chinook jargon," which takes its name from a small tribe formerly residing at the mouth of the Columbia, in common use among all the tribes from California far up into Alaska, and eastward to the great divide of the Rocky mountains. In the southwest the Navaho-Apache language is understood by nearly all the Indians of Arizona and New Mexico, while on the plains the Sioux language in the north and the Comanche in the south hold almost the same position. In addition to these we have also the noted "sign language," a gesture system used and perfectly understood as a fluent means of communication among all the hunting tribes of the plains from the Saskatchewan to the Rio Grande. (3) Dialects (page 17): The linguistic affinity of the Cherokee and northern Iroquoian dialects, although now well established, is not usually obvious on the surface, but requires a close analysis of words, with a knowledge of the laws of phonetic changes, to make it appear. The superficial agreement is perhaps most apparent between the Mohawk and the Eastern (Lower) Cherokee dialects, as both of these lack the labials entirely and use r instead of l. In the short table given below the Iroquois words are taken, with slight changes in the alphabet used, from Hewitt's manuscripts, the Cherokee from those of the author: Mohawk Cherokee (Eastern) person oñgwe' yûñwi fire otsi'ra' atsi'ra (atsi'la) water aweñ' awa' (ama') stone oneñya' nûñyû' arrow ka'noñ' kûni' pipe kanoñnaweñ' kanûñ'nawû hand (arm) owe'ya' uwâ'yi milk uneñ'ta' unûñ'ti five wisk hiski tobacco [tcarhû', Tuscarora] tsârû (tsâlû) fish otcoñ'ta' û'tsûti' ghost o'skeñna' asgi'na snake eñnatûñ i'nadû' Comparison of Cherokee dialects