The pottery from Sikyatki is especially rich in picture writing, and imperfect as these designs are as a means of transmitting a knowledge of manners, customs, and religious conceptions, they can be interpreted with good results. One of the most important lessons drawn from the pottery is to be had from a study of the symbols used in its decoration, as indicative of current beliefs and practices when it was made. The ancient inhabitants of Sikyatki have left no written records, for, unlike the more cultured people of Central America, they had no codices; but they have left on their old mortuary pottery a large body of picture writings or paleography which reveals many instructive phases of their former culture. The decipherment of these symbols is in part made possible by the aid of a knowledge of modern survivals, and when interpreted rightly they open a view of ancient Tusayan myths, and in some cases of prehistoric practices.[116] Students of Pueblo mythology and ritual are accumulating a considerable body of literature bearing on modern beliefs and practices. This is believed to be the right method of determining their aboriginal status, and is therefore necessary as a basis of our knowledge of their customs and beliefs. It is reasonable to suppose that what is now practiced in Pueblo ritual contains more or less of what has survived from prehistoric times, but from Taos to Tusayan there is no pueblo which does not show modifications in mythology and ritual due to European contact. Modern Pueblo life resembles the ancient, but is not a facsimile of it, and until we have rightly measured the effects of incorporated elements, we are more or less inexact in our estimation of the character of prehistoric culture. The vein of similarity in the old and the new can be used in an interpretation of ancient paleography, but we overstep natural limitations if by so doing we ascribe to prehistoric culture every concept which we find current among the modern survivors. To show how much the paleography of Tusayan has changed since Sikyatki was destroyed, I need only say that most of the characteristic figures of deities which are used today in the decoration of pottery are not found on the Sikyatki ware. Perhaps the most common figures on modern food bowls is the head of a mythologic being, the Corn-maid, _Calako-mana_, but this picture, or any which resembles it, is not found on the bowls from Sikyatki. A knowledge of the cult of the Corn-maid possibly came into Tusayan, through foreign influences, after the fall of Sikyatki, and there is no doubt that the picture decoration of modern Tusayan pottery, made within a league of Sikyatki, is so different from the ancient that it indicates a modification of the culture of the Hopi in historic times, and implies how deceptive it may be to present modern beliefs and practices as facsimiles of ancient culture.