10 Anniversary Address. 



merely under wrong impressions. A real digger has no object 

 in imposture. Sucli cannot be said for the g' ass -grinders, who 

 were sometimes more transparent than the material they had 

 manipulated. 



So much for this episode. Let us now go hack to the 

 Diamond, and endeavour to ascertain some particulars relating 

 to its history. 



On the Cudgegong there are five principal places where the 

 mineral is found. They occur at various depths from the 

 surface, greenstone in some instances having caused the formation 

 ot unequal hollows for the collection of drift. The intrusive 

 rock follows the strike of the older rocks, which is about 

 N. 25o W. 



The older drift has been since covered by a basaltic flow, which 

 in turn has suffered from the denudation that has spread the 

 drift, so producing a younger drift, to which Mr. Norman Taylor 

 assigns tlie term Newer Pliocene, in contrast with the older. 

 This designation is, no doubt, due to his Victorian practice. 

 The basalt he compares with that of the Coliban Siver in 

 Victoria, which from my own personal knowledge of that locality, 

 I can confirm. 



The Carboniferous rocks have not furnished much detritus to 

 the older drifts ; but such occurs abundantly in the river bed. 

 A still more recent wash of drift occurs on the present surface. 



Mr. Taylor very properly presents to notice a diflB.culty which 

 has been hinted at already. 



If the Diamonds were derived from the Carboniferous rocks, 

 why are they not found in the river bed, except where the 

 tailings of the miners have been washed in? From all the 

 evidence arrived at, the newer drift is derived from the older, 

 and with them is associated a cement of quartz and altered rock 

 held by a yellowish green silicate of iron and hydroxide of iron, 

 from hand specimens of which I have myself taken gold. Mr. 

 Taylor say.5 it contains Diamonds also. 



Many of the pebbles, which are of quartz and very hard flinty 

 altered rock, have long attracted my attention, on account 

 of the glaze or polish which they wear. They have exactly 



