290 Silver Lead Ores of Kurnool and [No. 8, new series. 



In addition to the above places, search which I directed to be 

 made in a range of hills called Lunkamulla immediately south of 

 the last named place has been successful in finding the mineral in 

 considerable quantity. It was however only brought to me after 

 I had left the district and I was not able to visit the spot. 



Coilcontla is situated about six miles to the west of the village 

 of Dhone in the Talook of that name, the site where the lead ore 

 occurs is £ mile south of the village. 



The surface of the country in the immediate neighbourhood is 

 exceedingly rugged, occasioned by the protrusion of granite hills 

 rising to an extreme height of about 500 feet above the level of the 

 main adjoining valley ; dykes composed of felspar, porphyry and 

 trap intersect the granite forming low hills ; well marked on ac- 

 count of their dark color in continuous ridges through the country ; 

 being apparently of less decomposable matter than the enclosing 

 rock, they have been left protruding from it as now seen ; these 

 dykes have a general direction east and west and extend over a 

 large portion of the Ceded Districts, they become more numerous 

 farther southward. At Pennacondah in the south division of Bel- 

 lary they form a very marked feature in the appearance of the coun- 

 try on account of their number. 



In addition to the above there is a large quartz dyke passing near 

 the site of the lead mine as well as one of the same material en- 

 closing large quantities of specular Iron seen near the public bun- 

 galow at Yeldoorty, 12 miles distant from Coilcontla, these like 

 the trap dykes have a general direction E. and W. 



The hills about Coilcontla are for the most part very bare of 

 timber ; a low brushwood occurring at intervals only on their sides. 



In the valley between these hills a considerable thickness of sand 

 resulting from the washings of their sides covers over the rugged 

 surface of the rock beneath, the inequalities in which form natural 

 reservoirs for water ; into this sand the Natives dig their wells for 

 agricultural purposes and obtain an abundant supply of water 

 through nearly the whole of the dry season ; the sinking of one of 

 these pits was the occasion of the discovery at this place of the mi- 

 neral now the subject of consideration. 



