A recent paper by Neil M. Judd in the Swanton Anniversary Volume, Essays in Historical Anthropology of North America revives an idea that should be corrected. This has to do with what has been done and what is being done concerning the archaeology of the Colorado River Valley and adjacent desert areas of western Arizona and southeastern California. Judd writes on page 434: “Although this region has long been inhabited by Yuman and Mohave groups, it is still terra incognita to archaeologists.” He mentions the woric of the Gladwins, of Hargrave, and of Cotton but fails to make any reference to other important papers that contain material on the region. Some of these are listed in the brief bibliography accompanying this note.