16 Sir 'T’. H. Pace’s Deferiptions of the 
- circumftance was reported to me by Mr. Rozerts, the Adjutant 
of the Works; and we, upon examining further, found that 
the quantity of water upon finking was confiderable, and that. 
it appeared perfectly frefh. I then ordered the well-finkers to 
proceed to this depth at another place, where they founda 
like appearance of good water; and the quantity was fo great, 
as to render it very difficult to keep the bottom of the well, at 
twelve feet deep, dry enough to fink further. Every exertion 
was notwithftanding ufed, and with great labour a well was 
funk to the depth of low water mark at fpring tides, about 
eighteen feet from the upper furface of the fand; when, tothe 
furprize of every perfon, the water that rofe from the bottom 
became, on a fudden, entirely falt. This put an end to the 
work fora time, asit feemed impoffible to penetrate deeper. I 
then confidered the matter very differently with my firft idea, 
and though the impoffibility of having a deep well clearly 
appeared, there remained a profpect of a fufficient fupply of 
good frefh water. It may now be neceffary to recolleé, that 
at avery few feet from the furface (eight feet) there was good 
water; that it continued in vaft quantity almoft to the {pring 
tide low-water-mark, after which the falt-water had appeared ; 
I therefore directed fand to be thrown into the well, to bring it 
a little above what had been the lowe fre/b-water line (twelve 
feet from the upper furface) and then drew the water out which 
had mixed. After this, the filtration into the well became again 
perfectly frefh, and in equal quantity to the firft appearance. 
This was, therefore, fixed as the greateft depth (twelve feet) 
and another well funk at forty feet diftance, with a horizontal 
brick drain, having holes left in the fides for filtration, as de- 
{cribed in the plan, to colle& the water, and the bottoms of 
both wells were fecured with hard materials; that the whole 
4 fupply 
