108 



Charles Fenner 



mera, having a bigger body of water, has made an heroic but unsuc- 

 cessful effort to persist in flowing on to reach the Murray in the 

 north. 



Fig. 2. — Diagram to indicate the mode of origin of the present di-ainage 

 system of the Glenelg, as it is conceived to have taken place. 

 The old stream courseS to the north, shown by broken lines, 

 probably never firmly established themselves/owing to the lack of 

 grade ; while those shown to the southward have been covered by 

 the 'newer basalt" flows. 



The southern streams were more blessed, and of these fortune 

 seems to have favoured the Glenelg. With a good slope, soft rocks, 

 and a good supply of water, this stream would rapidly deepen its 

 valley, receiving few tributaries en route. Nearly all that were 

 developed naturally came from the east, because the gentle tilt of 

 the land surface to the south-west would tend to direct the western 

 water away from the river, to collect in swamps and lakes, as is 

 still the case. 



