4 - 2(3 
TERMES. 
sions or columns between the future arched apart-^ 
ments resemble the pinnacles upon the fronts of 
some old buildings, and demand particular notice 
as affording one proof that for the most part the 
insects project their arches, and do not make 
them, as I imagined for a long time, by excava- 
tion. 
“ The area has also a flattish floor, which lies 
over the royal chamber, but sometimes a good 
height above it, having nurseries and magazines 
between. It is likewise water-proof, and contrived, 
as far as I could guess, to let the water off, if it 
should get in, and run over by some short way 
into the subterraneous passages which run under 
the lowest apartments in the hill in various direc- 
tions, and are of an astonishing size, being wider 
than the bore of a great cannon. I have a me- 
morandum of one I measured, perfectly cylindri- 
cal, and thirteen inches in diameter. 
These subterraneous passages or galleries are 
lined very thick with the same kind of clay of 
which the hill is composed, and ascend the inside 
of the outward shell in a spiral manner, and wind- 
ing round the whole building up to the top inter- 
sect each other at different heights, opening either 
immediately into the dome in various places, and 
into the interior building, the new turrets, ike. or 
communicating thereto by other galleries of dif- 
ferent bores or diameters, either circular or oval. 
“ From every part of tliese large galleries are 
various small pipes or galleries leading to different 
parts of the building. Under ground there are a 
