2O A TOUR ROUND NORTH WALES. 



the hill, and encom patties about one 

 half of it's extent. This was probably 

 Roman, and has been intended to guard 

 the pattages and acceffible parts, when 

 their ores lay expofed to the plunder of 

 the Britons*. 



From Llanymynech, great quantities 

 of Llangynog-f- flate have been fent to 

 Briftol; and of late years, lead and 

 zinc, raifed in this parifh, have been 

 conveyed by the Stourport canal to 

 Birmingham, Macclesfield, and other 

 places. 



About two miles north-weft of Llan- 

 ymynech, on the bank of the Virnwy, 

 once flood the Caftle of Carreg Hwva : 

 of this there is no veftige remaining, 

 except the fofs which guarded it on the 

 eaft. There is but little account of this 

 place in hLftory. In the year 1162, it 



* Cambrian Regifler, I. 27 j. 



+ Llangynog is a village about fifteen miles diftant, in 

 whofe mountains much flate is token. 



5 was 



