2 NOTES ON A CHIPPED BOULDER. 



this place, but the above figures prove that it is not the 

 case. I had already noticed this fact when collecting, 

 but only after carefully sorting the specimens could I 

 fully prove it. 



Considering that the quarry on Coal Hill was so 

 close to the camping grounds, and that, notwith- 

 standing its situation 93.9 per cent, of the implements 

 were made from a different kind of rock, we are 

 forced to assume that the quality of the rock was the 

 most essential feature when it was intended to produce 

 an implement. Though unlimited quantities were avail- 

 able in the quarry on Coal Hill, the quality of this par- 

 ticular kind of chert was not such that it was highly 

 treasured by the Aborigines as a suitable material for 

 implements. They unquestionably preferred other kinds 

 of cherts to that occurring on Coal Hill; but the ques- 

 tion arises, whence did they procure the raw material, 

 of which they consumed such large quantities in the 

 manufacture of their implements? 



From the study of the specimens I collected I 

 had already come to the conclusion that the gravel de- 

 posits of the various creeks, but above all the gravel and 

 conglomerate deposits of diluvial age, were the source 

 from which suitable material was obtained. I noticed 

 that numerous implements, usually of the less finished 

 type, represent fragments of water-worn pebbles or 

 boulders, the smooth, water-worn crust being still pre- 

 served. It is, however, not till a find I recently made 

 on a camping ground north of Kempton that this view 

 was fully confirmed. 



This camping ground is situated on the eastern slope 

 of a low hill which stands out prominently from the sur- 

 rounding fiat country. It is a considerable distance away 

 from any present watercourse, and about 200 feet, I 

 should say, above the level of the River Jordan. Here 

 I found the water-worn pebble, which forms the subject 

 of this paper. I first discovered the core, and, as my 

 attention was drawn to some fragments lying close about 

 it, which seemed to be of the same kind of rock, I col- 

 lected a few, and tried to fit them to the core. They 

 were failures, but after repeated attempts I succeeded in 

 fitting one to its original position, and, encouraged by 

 this, I hunted for more, and eventually succeeded in 



