582 Scientific Proceedings, Royal Dublin Society. 
clay galls. The lower Rewah sandstone here stretches out a consider- 
able distance in front of the scarp, and the pit was just on the northern 
edge of this terrace, some 20 feet below the summit, and itself about 10 
feet deep. On the top of the diamond bed was a foot or so of hard thin 
flaggy sandstone, and about seven feet of the same mixed with shale. 
A little further to the south and west on this terrace was an old pit 
between 30 and 40 feet deep, but the bottom filled with water, so that 
the rocks immediately above the diamond bed could not be seen, but 
there were certainly 10 to 15 feet of shale between it and the lower 
Rewah sandstone. In all the pits examined there must have been 10 
to 20 feet of shale intermediate. The Pannas are here very thin, so 
that this position is not much above the top of the Kaimurs (the lowest 
group of the upper Vindhyans.) There are some small outlying hills to 
the north at the village of Bungla and north of Babupur. ‘The former 
is about 50 feet high, with Kaimurs at the base, then 15 to 20 feet of 
shale capped in turn by the lower Rewah sandstone ; this was the only 
outlying hill in which the shales were seen (on account of the northern 
overlap). A few hundred yards to the north-east, another little hill has 
been excavated in every direction by the old diamond searchers. Again 
at Babupur are numerous old pits, and some sufficiently well preserved 
to admit of examination. They are about 15 feet deep exposing sand- 
stone with thin flaggy beds at the top, but no shales. 
' “A bed of fine, brown Sandstone, including fragments of a green 
silicious rock, and bits of red and green shale, was traced from Bumb- 
hen to Kissengurh, which is not impossibly the continuation of the 
diamond bed ; that the natives do not work to the east is no proof that the 
beds do not continue in that direction. This is evident from the fact of 
there being no pits at Bungla, notwithstanding the hills all round, even 
to the north, having been extensively worked. 
~ “Tt is, therefore, almost certain that at Bungla the diamond bed exists 
thovgh untouched.” 
Mr. Medlicott notices the transition of the conglomerate from 
its position among the shales to its condition as a pure, fine 
sandstone conglomerate. 
In reference to the extension of the conglomerate, he remarks 
that from the nature of the case—its occurrence among fine beds 
—it has per se a precarious existence. He finds it difficult to 
determine the reasons why the deposit has not been worked in 
some localities, as at the base of the hills. In some eases, in the 
outlying patches, the margin of the deposit has been reached, in 
others it may have died out; the latter state of things might be 
readily ascertained were a few trenches dug in selected localities. 
Mr. Medlicott makes some suggestions as to the original matrix 
of the gem, which I have already quoted. Besides the mines, he 
enumerates several localities where there were workings in accu- 
mulations of superficial detritus ; these are at Udesna, Sakeriya, 
Mujgoan, and Boghin, 
