how nearly they approach a dead level. 
very heavy thunderstorm in the country west of the Bogan wie 
seeming to be perfectly still. I have seen some waterholes m 
neighbourhood of Cobar that are called blackfellows’ tanks, wit 
are supposed to have been excavated or at least deepened byt 
aboriginals as camping-places in their hunting expeditions, | 
they left the river frontages after wet weather ; but these 
easily distinguished from the gilgies proper by the fact that at® 
blackfellows’ tanks the clay excavated is still to be seen besidet 
waterholes, while in the gilgies there is no appearance of any 
bankment, the ground all round being perfectly level. a v 
account for the gilgies being few and shallow in the vicimh 
water-courses or permanent water, and more numerous and di 
in 
at work 
other agency than that which originally 
