366 SIR T. L. MITCHELL's DISCOVERIES 
the supply and retention of water in a dry and parched 
country. "The division of the main river into others already 
mentioned, is no less so ; irrigating thus from one principal 
channel extensive regions of rich earth beyond the Darling, 
while the surplus, or overflow, instead of passing, as in 
common cases, to the sea, is received in the deep channel of 
the Narran, and thereby conducted to that extensive reser- 
voir where, on rock or stiff clay, and under ever-verdant 
. Polygonum, it furnishes an inexhaustible supply for the sup- 
port of animal life. 
* Along the banks of the Narran, the grass is of the very 
best description, Panicum levinode, and Anthistiria australis 
(barley grass and kangaroo grass of the colonists) growing on 
plains or in open forests, very available, in every respect, for 
cattle stations. The seeds of the Panicum levinode constitute 
2 _ is connected, by a low neck of grassy downs, with small u 
- - knolls of trap rock belonging to one of the masses of sr 
