POTTERY AND STONE IMPLEMENTS FROM NAVAHO NATIONAL MONUMENT] The designs on fragments of pottery found in ruins in northern Arizona are identical with or related to those from the Black Falls ruins, but differ somewhat from those on pottery from ruins higher up the Little Colorado river. If the history of the modification of ceramic symbols in any of the large composite pueblos of the Southwest be studied, it will be noticed that there are often radical changes, the later symbols not being modifications of earlier ones. Thus modern Zuñi pottery designs differ materially from those found in ruins in the same valley. The modern pottery from East mesa is wholly different from that of Sikyatki, a few miles away. Again, in so-called modern Hopi pottery, Tewa symbols derived from the Rio Grande have replaced old Hopi symbols dominant before the advent of Tewa clans. The changes in pottery symbols in every large composite pueblo are not due to evolution of the modern from the ancient, but reflect the history of the advent of new clans, powerful enough to substitute their designs for those formerly existing. One of the problems of the ethnologist is to determine symbols associated with certain clans, and by means of legends to identify clans with ruins. Having determined the symbols introduced by certain clans and the places where these clans halted in their migrations and built pueblos, the course of these prehistoric movements may be followed. Comparison of symbols on pottery from northern Arizona with those from Black Falls ruins support, so far as they go, the legends that the Snake people, who once lived at Wukóki near the Black Falls, lived also in cliff-houses now ruins near Marsh pass or the White mesa. The symbolism indicates the presence of the same clans, and tradition is thereby supported. CLIFF-DWELLERS CRADLE One of the most instructive specimens collected in the Navaho National Monument was found by Mr. W. B. Douglass in a ruin designated as Cradle House. This object is a cradle made of basket ware, open at one end and continued at the opposite end into a biped extension to serve for the legs. It is decorated on the outside with an archaic geometric ornamentation, the unit design of which is shown in the accompanying illustration. This specimen (pls. 19-21) may be regarded as one of the finest examples of prehistoric basketry from the Southwest; moreover, with one exception, it is the only known cradle of this form. A pair of infant’s sandals found with the cradle leaves no doubt as to its use, while the character and symbolism of the decoration refer it to the ancient cliff-house culture. The design (fig. 3) suggests that which characterizes certain specimens of the well-known black-and-white pottery found in the San Juan drainage. Evidences of long use and repair appear, especially on one side. Unfortunately, the specimen, although entire when found, later was broken across its middle.