44 * The Account of a 
In addition to this reason, there was another which offered 
itself, and that was, the prospect of being able to obtain the 
length of a degree of longitude in an early stage of the sur- 
vey ; for it had been suggested, and upon inquiry was found 
to be true, that Dunnose in the Isle of Wight was visible, in 
particular moments of fine weather, from Beachy Head on the 
coast of Sussex : but attention was at the same time given to 
the recommendation of General Roy, in the selection of 
Shooter s Hill and Nettlebed, as places for observing the di- 
rections of the meridian ; and it was resolved, whatever pre- 
ference might in future be given to those on the coast for this 
important operation, that at all events such observations 
should be made, as might determine the distance between the 
stations recommended by the General. 
Having therefore formed an outline for the operation of the 
year 1792, upon the approach of spring, Captain Mudge and 
Mr. Dal by explored the country over which it was intended 
to carry the triangles, and visited such stations in the series of 
General Roy as were judged to be proper for the above pur- 
pose. 
In the choice of those stations which were about to be se- 
lected, instructions had been given by his Grace the Duke of 
Richmond to avoid towers and high buildings, as getting an 
instrument on them had, by the experience which the former 
operation afforded, been found difficult and dangerous ; such 
of them therefore as were thus circumstanced were avoided, 
and near the most proper ones, stations were chosen on the 
ground. From these directions the points of junction were 
necessarily confined to Saint Ann's Hill, Botley Hill, and Fair- 
light Down, because the pipe sunk near Hundred Acre House 
