Journal of California and Great Basin Anthropology

The data from the oral tradition appear to form a plausible line of evidence that Numic populations did move north and east from the southwestern Great Basin. The extant indications of direction of movements are quite consistent with the directions postulated by Lamb. Such population movements would likely have taken place fairly late in time for these indications to still be present in the oral tradition. There are very few oral tradition data to support either of the two competing hypotheses.