As I shall treat of the same subject more fully in another publication, I shall but briefly touch upon the intimate connection there existed between these calendar-signs and the twenty classes into which the population was strictly divided. It is known that an individual received the name of the day on which he was born and it is possible to prove that this determined his position in the commonwealth, his class and his future occupation. Each child was formally registered by the priestly statisticians at birth, and at about the age of six, when his name was sometimes changed, he entered one of the two educational establishments where he was brought up by the State, under the absolute control of the priesthood and rulers. It can be gleaned that one of the chief cares of the latter was to maintain the same average number of individuals in the distinct classes, to which the various forms of labor were allotted and who became in time identified with these. In order to keep the machinery of state in perfect adjustment, individuals had sometimes to be transferred from the class into which they were born, to another. In some cases this seems to have been arbitrarily ordered by the authorities, but the latter appear to have guided themselves by the position of the parents and to have established the custom that an individual might alternatively be transferred into the paternal or maternal class, but not into any other. As each class was, moreover, divided into an upper and lower one, it was possible for each person to elevate himself from the lower to the higher by individual merit or to incur abasement, for unworthy conduct, and being, as we have already seen, “reduced to the official rank of women.” The direct outcome of such a form of organization was stringent laws governing marriage, it being expedient that certain classes only should intermarry, not only to avoid complications but also to ensure a certain degree of coöperation conducive to the prosperity of the State. In the tribal laws still existing amongst the native tribes of North America, I see the logical survivals of an ancient scheme of organization.