4 KING: KADAPAH AND KARNÜL FORMATIONS. [PART t. 
to the Pagoda of Parawuttom* in 1794. This old writer is rather 
unfortunate in his deseription, for he makes out that this part of the 
country (the passage of the Kistnah through the Nullamullays) consists 
of granite. He, however, describes the peculiar weathered character of : 
the surface and the internal structure of rocks (quartzites) which he 
saw. -He speaks of iron and diamonds as being found in the same 
mountain range, 
Dr. Benjamin Heyne, of the Madras establishment (1814), wrote 
ved RD an “ Account of the Diamond Mines in India, 
in which he describes the diamond workings of 
Chennoor in the Cuddapah, and of Banaganpily in the Kurnool, Dis- 
tricts, besides treating of others in neighbouring districts. He gives a 
very tolerably accurate description of the diamond-bearing beds in these 
localities and of the nature of the matrix of the diamond, but does not 
bind himself to any views regarding the geological age of the rocks. 
Though he evidently thought that the condition and mode of occurrence 
of the diamond bed at Banaganpily were very different from the 
alluvial washings of Chennoor, he nevertheless commits himself to the 
conclusion that all the mines which he saw are nothing else but excava- 
tions in alluvial soil. The true state of the case being that in Bana- 
ganpilly, the mines are rock workings. He also treats more generally 
of the whole series of rocks in another interesting paper called “A 
journal of a tour from Cuddapah to Hyderabad in 1809 (Tract 19).” 
In 1825, there was published a paper on the “ Diamond Mines of 
De UR OW. Vetsey Southern India,” f by Dr. H. W. Voysey, in which 
(1825). are given descriptions of the country and of the 
associated rocks. This writer was of the Wernerian school of geologists, 
* Called Sreeshalum on map. 
T Tracts, Historical and Statistical, on India, London, 1814 (Tract 3). 
f Asiatic Researches, vol. XV, p. 120. 
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