458 Major-General Roy’s Account of the 
the ditches, and height of the banks' of the old Roman way ;: 
therefore treftels, fuited for the purpofe, had b'een now pre- 
pared : and left any accident might have happened in conduft- 
ing this part of the operation, fo as to oblige ns to a repetition,, 
double pickets 'were placed in the ufual manner in the ground, 
two rod lengths from the twenty-fixth ftation, to which we 
could have referred, without going back as far as the tripod 
left at the twenty-ninth ftation, the point from, which we had 
departed in the morning* 
Bad weather prevented any progrefs being made on the 25th; 
and, on the 2.6th, all that could be done was to meafure the 
twenty-fecond and twenty-firft hypothenufes. 
Qn Friday the 27th, tine work went on more expeditioufly, 
having in the courfe of that day meafured fix hypothenufes, 
and placed the tripod at the fourteenth ftation. 
On Saturday the 28th, eight hypothenufes were meafured, 
and the tripod was placed at the fixth ftation. In this day’s 
operation, being arrived near the bridge laid over Wolfey River, 
double pickets were placed in the ground in the point anfwer- 
ing to the extremity of the iiy2d rod, reckoning from the 
north-weft, or the 198th rod from the fouth-eaft end of the 
bafe, that we might, recur to them in cafe of accident; and 
the eighteen rod lengths, hetween this point and the ftxth 
ftation, were meafured on the level, inftead of the hypothe- 
nufal line, which required the alteration of the reduftion as 
diftinguifhed by the afterifk in the general table. 
On Monday the 30th of ikiguft, the meafurement with the 
glafs rods was completed* ; when the extremity of the 1370 th 
rod 
* The gentlemen who were prefent at, and affifting in, the laft day’s operation 
were Captain Bisset, Mr. Greville, Sir William Hamilton, Mr. Lloyd, 
and 
