Such an examination must be directed towards obtaining some necessary points in the life-history of each custom, rite, and belief. We have to approach this part of our work guided by the fact that folklore cannot by any possibility develop. The doctrine of evolution is so strong upon us that we are apt to apply its leading idea insensibly to almost every branch of human history. But folklore being what it is, namely the survival of traditional ideas or practices among a people whose principal members have passed beyond the stage of civilisation which those ideas and practices once represented, it is impossible for it to have any development. When the original ideas and practices which it represents were current as the standard form of culture, their future history was then to be looked for along the lines of development. But so soon as they dropped back behind the standard of culture, whatever the cause and whenever the event happened, then their future history could only be traced along the lines of decay and disintegration. We are acquainted with some of the laws which mark the development of primitive culture, but we have paid no attention to the influences which mark the existence of survivals in culture. For this purpose we must first ascertain what are the component parts of each custom or superstition; secondly, we must classify the various elements in each example; and thirdly, we must group the various examples into classes which associate with each other in motif and character. By this treble process we shall have before us examples of the changes in folklore, and demonstrably they are changes of decay, not of development. By grouping and arranging these changes it may be possible to ascertain and set down the laws of change--for that there are laws I am nearly certain. It is these laws which must be discovered before we can go very far forward in our studies. Every item of custom and superstition must be tested by analysis to find out under which power it lives on in survival, and according to the result in each case, so may we hope to find out something about the original from which the survival has descended. Each folklore item, in point of fact, has a life history of its own, and a place in relationship to other items. Just as the biography of each separate word in our language has been investigated in order to get at Aryan speech as the interpretation of Aryan thought, so must the biography of each custom, superstition, or story be investigated in order to get at Aryan belief or something older than Aryan belief. We must try to ascertain whether each item represents primitive belief by direct descent, by symbolisation, or by changes which may be discovered by some law equivalent to Grimm's law in the study of language. Analysis of each custom, rite, or belief will show it to consist of three distinct parts, which I would distinguish by the following names:-- 1. The formula. 2. The purpose. 3. The penalty or result.