According to our already described methodological plan, the area or range of the facts covered by all this evidence must be divided into smaller fields. Or, in other words, it is needful to bring our information under several headings, show the points upon which there is complete agreement, and discuss the other points in greater detail. There are forty-nine statements (including one of the six just summarily mentioned). Not all of them give us full information concerning the whole of our subject; some mention only one or other of the methods of obtaining wives, without asserting or denying the existence of the other forms. But roughly speaking, we may say that in all tribes there are on the one hand some normal, pacific modes of obtaining wives (exchange of relatives, promise in infancy, betrothal), and on the other hand some more or less violent forms (elopement, capture). About twenty-three of the forty-nine statements, all which are explicit and reliable, assert the existence of both these forms amongst the tribes they deal with. The violent forms, elopement and capture, seem to have been rather the exception than the rule, but there seems to have been not a single tribe in which elopement was completely absent.[139] Among the Kurnai elopement was a prevalent form of marriage. In all other tribes the methods, called here normal or pacific, were prevalent. The main features of these forms are: betrothal in infancy, exchange of sisters or relatives, and a series of obligations and mutual duties which both contracting parties undertake. All these features may be briefly discussed. [139] Compare _Trans. R.S.V._, p. 118. Howitt says that in all South-Eastern tribes elopement was in use; especially if there was any difficulty in finding a relative for exchange, or if two people fell in love with each other. It was considered a breach of custom and law, but it was a valid, recognized form of marriage if legalized subsequently. Practically the same may be said of all tribes of the continent.