It contains a fresh collation of all the chief authorities (Heb., Syr., Syr.-Hex., Lat.
Rising in the Warm Bokkeveld, it pierces the mountains by Mitchell's Pass, flows by the picturesque towns of Ceres and Worcester, and receives, beyond the last-named place, the waters which descend from the famous Hex River Pass.
The Touws (90 m.),which rises in the Great Karroo not far from the sources of the Hex river, is a tributary of the Groote river.
In 9 m., the Hex River Pass is reached soon after leaving Worcester, 794 ft.
The Mediterranean basin has been a centre of preservation of Mibcene vegetation: the oleander is said to have been found in local deposits of even earlier age, and the hoim oak (Quercus hex) is the living representative of a Miocene ancestor.
To the south-west and west it is bounded by the Hex River Moun tains and the Cold Bokkeveld, eastward by the Great Fish River.