As would naturally be the case with an element of decoration so constantly duplicated as the feather, there are numerous instances where it has become so changed that while a figure was probably intended for a feather symbol, it is difficult to prove that it was such. These doubtful cases are not, therefore, discussed from the uncertainty which hangs about their identification. I believe enough has been written above to show that the feather was regarded by ancient Hopi potters as an important decorative motive, and that its symbolism had significant differentiations, so that even different kinds of feathers were indicated by different markings on those symbols. Considering also how strong a hold the feather has on the modern Hopi mind in ceremonial usages, I am led to the belief that its influence on the ancient mind was of the same general character. Thus we come back to a belief, taught by other reasoning, that ornamentation of ancient pottery was something higher than simple effort to beautify ceramic wares. The ruling motive in decorating these ancient vessels was a religious one, for in their system everything was under the same sway. Esthetic and religious feelings were not differentiated, the one implied the other, and to elaborately decorate a vessel without introducing a religious symbol was to the ancient potter an impossibility. This union is weaker in the mind of the modern Hopi, yet still potent; but as the new conception of beauty has crowded out the religious element, the character of the pottery and its decoration have deteriorated. Many patterns which once had a religious symbolism are mechanically followed, through conservatism, and pottery of fair character is still made, but every Pueblo shows a marked decadence in the potter's art. As time goes by and the Hopi are more modified by their new environment—contact with civilization—the white crockery of the traders will replace the aboriginal wares. This will lead to a still greater degeneracy of native ceramics, and, if they survive at all, it will be more as a commercial product than a medium of religious expression. It can readily be seen that the decorations on pottery made "for the trade" will no longer be a spontaneous expression of aboriginal art, but imitative of types of beauty which please the purchaser. Into that condition much of the pottery made in pueblos along the railroad has already drifted, and Hopi potters are not behind their neighbors in recognizing those decorative designs which please the buyer and those which are most often rejected. Quite in line with what is said above is the feeling which leads some of the best potters of the East Mesa to imitate ancient forms of decorations. These copies are adorned with old patterns because ethnologists ask for ancient ware and purchase vessels with imitations of ancient symbols more eagerly than modern. Trade cannot revive the old religious feeling which