The migrations of which we are speaking must, if the possession of one phratry name in common be worth anything as evidence of a closer connection between the groups, have been internal to a group or, if the term be preferred, to a nation occupying the south of Queensland. For in the absence of evidence that phratry names are to be found outside their own linguistic groups, we cannot but infer from the quadripartite division of the Wuthera phratries both the linguistic unity (and language must be in Australia the ultimate test of racial relationship on a large scale) and the internal movements of the group in which they occur.
In favour of the primitive unity of the Wuthera groups, is the fact that with small exceptions, and those on the outskirts of the district, the area occupied by the assumed homogeneous pre-phratry group has the same class names throughout—which is at the same time a proof that the class names are posterior to the phratry names; for the later the date, the more extensive the group, may be taken to be the rule in savage communities; if the phratry names came later than the class names we should expect them to be identical, and the class names different instead of the reverse. But to the relative age of classes and phratries we return at another point of our argument.
The available data being few, it could hardly be expected that a discussion of them would be very fruitful. In the present chapter we have, however, shown that the phratry names and organisation are probably of very early date, that considerable movements of population took place within the linguistic groups subsequent to the adoption of the phratry names, and that these names have been selected for some explicit reason and not adopted at haphazard.
 For references, meanings, etc. see chap. IV.
 See Man 1905, no. 28.
 Cf. Man, 1905, no. 28.
 But see J.R.S. Vict. XVII, 120.