The following pages are more in the nature of a preliminary report than an exhaustive account of the antiquities of the valleys of the upper Verde River and Walnut Creek. This report deals with areas little known archeologically, although, by reason of their geographic positions, presenting to the student of the prehistoric culture of Arizona most interesting problems. The aim is to consider types rather than to enumerate many examples of the same kind of ruins. The present discussion is confined for the greater part, though not entirely, to architectural features.