i 14 Gen . Roy’s Account of 
time of the co-operation, until it was finally clofed on the 17th 
of October. 
For the greater part of the time, the weather was extremely 
bad; neverthelefs, on the particular nights when the moll im- 
portant obfervations on our fide were made, namely, thofe at 
Dover and Fairlight Down, the nights happened very fortu- 
nately to be favourable, fo as to enable us to interfedt, with 
great accuracy, the two diftant points on the French coaft of 
B lancnez, and Mantlambert *, and thereby to eftablifh for ever, 
the triangular connection between the two countries. 
The Duke of Richmond, Matter General of his Majefty’s- 
Ordnance, had, in the mod liberal manner pofiible, given 
every affiftance to the operation (from that great department 
over which he prefides with fo much honour to himfelf and 
advantage to the publick) by furnifhing an officer and a de- 
tachment of artillery-men for the work ; ordering the laboratory 
at Woolwich + to fupply whatever fire-works might be wanted 
for fignals ; and temporary fcaffolds to be eredled at Greenwich 
Obfervatory, Shooter’s Hill, and Dover Cattle, for the reception 
of the inftrument. But what was ttill of more importance than 
anv of thefe, his Grace had permitted Lieut. Fiddes. (one of the 
engineers on the furvey then under my direction) to be em- 
ployed, in the lummers of 1786 and 1787, in making a very 
accurate plan of that part of Romney Marfh where the bale 
of verification was to be meafured. In a country lo much in- 
terfered by ditches, and where there were io many ponds of 
water to he avoided, without fuch a plan railed before-hand, 
* The name of this hill is vulgarly pronounced Bouhmberg , and it is even 
written in the lame manner in the book, La Mtridiennc verifies . 
•j* Major Congreve, of the Royal Artillery, had the management of the lights 
at Shooter’s Hill ; and his ailiilance was found to be moil eflentially ufeful. 
