One between Roe's River on the north and Prince Regent's River on the south.2.

Macdonald's Range that throws off streams to Prince Regent's River on the north and to Glenelg River on the south.

3.
Whateley's Range which gives forth streams to Glenelg River on the north, and to the low country behind Collier's Bay and Dampier's Land on the south.
These branch ranges as well as the principal one are all composed of ancient sandstone, deposited in nearly horizontal strata, or of basaltic rocks which are only visible in certain places, and are most fully developed in that part of Stephen's Range which lies behind Collier's Bay, and in the low ground near Glenelg River.
With the extent of Stephen's Range I am unacquainted; but I have no doubt that the high land whence the Fitzroy River takes its rise is merely an under-feature again thrown off from it, and which I propose to call Wickham's Range after Captain Wickham, R.N., the discoverer of the Fitzroy.
We may form some idea of the limits of Stephen's Range in a north and east direction from the following passage extracted from Captain King's survey of these coasts:* Lacrosse Island is situated in the entrance of a deep opening trending to the south-south-west towards some steep, rugged hills.

The character of the country is here entirely changed.

Irregular ranges of detached rocky hills of sandstone formation, very slightly clothed with small shrubs and rising abruptly from extensive plains of low, level land, seem to have superseded the low wooded coasts that almost uninterruptedly prevails between this and Cape Wessel, a distance of more than six hundred miles! (*Footnote.