CASTLE, in old writers, is also used for a fortified town or village.
CASTLE-STEAD an appellation given by the country people in the north of England to the Roman castella, as distinguished from the castra stativa, which they usually call cheesters. Horsley represents this as a useful criterion by which to distinguish a Roman camp or station. There are several of these castella on Severus's wall. They are generally sixty feet square; their northern side is formed by the wall itself, which falls in with them; the intervals between them are from six furlongs and a half to seven; and they seem to have stood closest where the stations are widest apart.