I have no time for other examples. I hope to have shown that there are cases in which it is possible to infer with certainty the ancient existence of forms of marriage from the survival of their results in the terminology of relationship. In other cases, differences of culture or the absence of intermediate links make it unjustifiable to infer the ancient existence of the forms of marriage from which features of terminology might be derived. Other cases lie between the two, the confidence with which a form of marriage can be inferred varying with the degree of likeness of culture, the distance in space, and the presence or absence of other features of culture which may be related to the form of marriage in question. Even in the cases, however, where the inference is most doubtful, we have no right dogmatically to deny the origin of the terminology of relationship in social conditions, but should keep each example before an open mind, to guide and stimulate inquiry in a region where ethnologists have till now only scratched the surface covering a rich mine of knowledge. LECTURE III Thus far in these lectures I have been content to demonstrate the dependence of the terminology of relationship upon forms of marriage. In spending so much time upon this aspect of my subject I fear that I may have been helping to strengthen a very general misconception, for it is frequently supposed that the sole aim of those who think as I do is to explain systems of relationship by their origin in forms of marriage. Marriage is only one of the social institutions which have moulded the terminology of relationship. It is, however, so fundamental a social institution that it is difficult to get far away from it in any argument which deals with social organisation. In now passing to other examples of the dependence of the terminology of relationship upon social conditions, I begin with one in which features of this terminology have come about, not as the result of forms of marriage, but of an attitude towards social regulations connected with marriage. The instance I have now to consider is closely allied to one which Professor Kroeber has used as his pattern of the psychological causation of the terminology of relationship.