As far as my researches have yet extended upon this point, it appears to me, first, that groups of natives have a distinctive or a local appellation, derived from the particular place they belong to, as Barmerara maru, the natives frequenting the lake called Barmera: Moolyoolpero maru, the natives frequenting the lagoon called Moolyoolko, and so on.

Secondly, a general or tribal name, as Narwijjerook, a native of the tribe so called, which includes the natives of Barmera and various others in that neighbourhood.

Karn-brickolenbola, a native of the tribe so called, and which includes various groups around Mooroonde.

Thirdly, it appears that wherever a change occurs in the name of the tribes to which contiguous groups of natives may belong, there is a corresponding change in the dialect or language spoken; thus the Narwij-jerook speak a dialect called Narwijjong, the Karn-brickolenbola tribe the Aiawong dialect, and so on.
In many of these dialects there appears to be little more difference than exists among the counties in England.

Such is the case up the course of the Murray from Lake Alexandrina to the Darling; and such Captain Grey found to be the case throughout a great part of Western Australia.