There is much talk these days, mostly for political reasons, about the purity and impurity of the human race, the usual implication being that purity of race should be preserved, even by means of prohibitive laws. Those who champion this or that issue of the question have probably studied the subject thoroughly (at least, they should have done so) spending many years examining the available published material or gathering data by personal investigation. Not having done that, perhaps I cannot support either side, may even lack the right to do so. But I have spent many years studying a phenomenon of human life considered more or less important by some dreamers commonly called students of folk music. This manifestation is the spontaneous music of the lower classes, peasants especially. In the present period of controversy over racial problems, it may be timely to examine the question: Is racial impurity favourable to folk (i.e., peasant music) or not? (I apply the word racial here to the music itself, and not to the individuals creating, preserving or performing the music.)