1850.] in Southern and Central India, 201 



I also saw a bed of a substance in specific gravity, hardness and fracture, 

 much resembling corundum excepting colour which was green. 



Monday, 2\st December, 1818. — Facts in illustration of the history 

 of iron clay formation, belonging according to Werner to the floetz 

 trap. 



1st. Its extensive diffusion, — Carnatic, Malabar Coast, Orissa, and 

 Midnapore. 



2d. Small elevation above the level of the sea. 



3d. Connection in the Carnatic with primary rocks, Concan, Ma- 

 labar. 



4th. Its being apparently confined to the coast or extending only 

 a short distance inland. 



Saturday, 9th January, 1819. — I quitted the cantonment, Se- 

 cundrabad, at three o'clock. I met Major Hopkinson at the bund 

 of the tank, who was making or repairing the road destroyed by 

 the overflow of last season ; he was in the act of directing the removal 

 of a large block of the greenstone ; he told me that the vein was con- 

 tinued beyond the tank in a northerly direction, but that it could not 

 be traced farther south ; also that the large vein crossing the road to the 

 residency, was continued in the same direction to Hyauttnuggur 12 

 miles distant. He mentioned the singular discovery of cairns and 

 druidical circles by W. P. of the Artillery ; one of them had been open- 

 ed lately of a curious formation and several bones had been found in it. 

 The granite continues to wear exactly the same aspect here and on the 

 road we have travelled from Secundrabad, the loggan stones and tors 

 being very numerous. 



Sunday, 10th January, 1819. — Halted the whole day at Chin- 

 chawalee ka Durga, and in the afternoon visited the tombs of 

 Golconda ; large cupolas supported on square pilasters of granite of an 

 extraordinary length, some of them were at least 20 feet high, of 

 solid stone. The tomb is in the centre of the hall, formed by the 

 cupola and is made of greenstone. Of this stone we discovered a 

 vein about 10 feet wide and running east by south, the same direc- 

 tion as those in Hydrabad : the sides were composed of granite 

 intermixed with the greenstone which affected the form of rhomboidal 

 blocks, and was penetrated by quartz veins. From the top of one 

 of the tombs we had a very fine view of the fort of Golconda, which is 



