oct. — MAR. 1858-59.] Lead Ores in the Cuddapah District. 279 



V. Report on Lead Ores in the Cuddapah District. By P. W. 

 Wall, Esq., Mineral Viewer. 



(Communicated by Government.) 



In that portion of my previous report which relates to the 

 locality described as near Nundiallumpett, in the Cuddapah Dis- 

 trict, I pointed out the connection existing between a number of 

 isolated points of occurrence of the mineral under consideration as 

 indicating one continuous vein or lode having throughout a uni- 

 form course or direction. 



It became, therefore, my object to pursue an examination of the 

 country in the direction thus indicated from the two extreme 

 points, with the view to ascertaining if a further continuation of the 

 lode could be traced out. 



In the northerly direction, the course indicated leaves the hilly 

 ground and passes for some considerable distance over an area of 

 level country, the surface of which is covered with soil and allu- 

 vial matter, and most unfavorable for investigations of this nature ; 

 from the southern extremity, however, the course is over a portion 

 of the mountainous range, my attention was therefore directed to 

 this part, and I have succeeded in discovering numerous other 

 points in the line of its course and tracing it for a further distance 

 of four miles. 



The ore is thinly scattered in this continued portion occasionally 

 disseminated through the gangue, but more frequently lining the 

 cavities, as occurs at the surface at the previously described parts 

 of it. 



At the most southern point as yet observed the rock becomes 

 more siliceous and scattered crystals of Copper Pyrites occur in it. 



A map of the locality with the course of the Lead vein shown 

 by a broad red line is herewith appended.* 



The vein throughout this latter extension continues to preserve 

 the uniform character with that of the other portions as observed 

 at the surface, its cellular or cavernous structure being throughout 

 a very marked feature which enables it to be readily distinguished 

 when making its appearance at the surface. 



* Vide PI. II. 



