794 MIN ERA LOGICAL DESCRIPTION OP THE ISLAND OF BANKA. 
tified district, extending to the vicinity of the new establishment, on 
the west side of the liver of the Minto Tawar numerous detached 
masses of Poudingue are observed on the track towards Denting 
Sarebu, and though highly diversified resemble in fracture and com¬ 
ponent parts those already described. These have probably been 
brought hither from the veins on the acclivities of the hill to be em¬ 
ployed for enclosure of the compounds, for walls about the burial- 
grounds, for tombstones and for various other purposes. The veins 
of Red-Iron-stone extending to the bed of the river, resemble those 
already illustrated by a description of the specimens found near the 
new establishment. 
Along the descent of the hill from this place to the town or the 
river of Minto, extensive veins of sand-stone rocks come into view, 
after removing the soil, in different places. At one spot, where a 
new road has been cut through one of these veins and a very large 
surface has been exposed, I took an opportunity of examining 
them. The first vein occupied an extensive tract on the foot of the 
hill, and passed into a similar vein somewhat further eastward, the co¬ 
lour of the stone is pure white, the grain very fine, and it possesses 
the same disposition to separate into figures with oblique angles and 
regular plain sides as the siliceous rock at Batu-lukut near Tampak 
and the blueish sand-stone found on the road to Jebus: but the ce¬ 
ment unites the grains in a very loose manner; when struck with a 
hammer the rock separates at regular fissures, hut many of the 
fragments crumble away if they are taken up. A white powder 
shews itself on the fracture and the cement appears to be of an 
argillaceous nature. By being preserved several months, the spe¬ 
cimens cellected here have acquired more hardness and adhesion. 
On the same descent, about 30 yards lower, in an eastern direction, 
I found another vein of sand-stone equally extensive, the cement 
of which is coloured red by the Iron-ochre of the neighbourhood. 
It is likewise intersected by fissures, and separates spontaneously 
into rhomboidal figures, planes &c. Some portions appear in irre¬ 
gular masses to which the ochre is agglutinated. These veins of 
sand-stone occupy the foot and part of the acclivity of the hill, ex¬ 
tending towards the river Teluk Robiya, until they unite with the 
bed of Poudingue above described. 
Eastward of the veins just mentioned I found a similar substance, 
more compact, of a brown colour, resembling the layers of Poudin- 
gue above described. In some of these veins the argillaceous ce- 
