A TOUR ROUND NORTH WALES. 129 



filled with water, the guides cannot always 

 be certain. 



I did not afcend to the fummit of Pen- 

 maen Mawr, though I have fince underftood 

 that there is at the top called Braich y Ddi- 

 nas, the arm of the city* an antient Britifh 

 fortification, in the walls of which, accord- . 

 ing to the additions to Camden, * were for- 

 merly at leaft a hundred towers all round> 

 of equal lize, and about fix yards in diarheter 

 within. From it's lituation, a hundred 

 men might here have defended themfelves 

 againft a great army, and it was large enough 

 to contain twenty thoufand foldiers. Of this 

 fortrefs, though I underfland very little is 

 left, yet there is fufficient to mew that it has 

 once been a very extenfive and important 

 place. Governor Pownall, who examined 

 it many years ago with great care, contrary 



* Gibfon's Camden, 673. 

 VOL. I. K tO 



