170 A TOTTR ROUND NORTH WALES. 



Segontium received it's name from the 

 river Seiont,* which runs from the lower 

 kke at Llanberis, pafTes under the walls, 

 and difcharges itfelf into the Menai, .near 

 the caftle of Caernarvon. It has been of 

 an oblong form, and formerly occupied 



about fix acres of ground. It is now 







divided into two parts by the road |vhich 

 leads to Beddgelert. 



Not far from hence is the antient fort 

 which belonged to it; this is alfo of an 

 oblong figure, and contains about an acre 

 of ground. The walls are at prefent 

 about eleven feet high and iix in thicknefs, 

 and at each corner there has formerly been 

 a tower. The Romans formed their walls 

 in a manner much different from what we 

 do now -, they firfl placed the ftones in 

 order one upon another, generally in two 



courfes, the one regular and the other in 



\ 



s 



* Cough's Camd. II. 548. 



a zigzag 



