4IST0RY OF SUSSEX 



EAR 



A fortresses partly inaccesible, by reason of 

 precipices, cliffs, or water, additionally 

 defended, by artificial works, usually known 

 as promontory fortresses 



R fortresses on hill-tops nith artificial defences, 

 following the natural line of the hill; 



Or though usually on high ground, less ' 



dependent, on natural slopes for protection 

 C Rectangular or other simple enclosures, int 



forts end towns, of the fiomano -British per 

 D forts consisting only of a mount with 



encircling ditch or fosse 



