The southern entrance (also known as Archcliffe Gate) to the western heights fortress was constructed in the 1860’s as part of a major revision of the southern defences. It was located at a point where the South Military Road attained the crest of the ridge. One of the major features of this entrance was the gatehouse itself which projected above the curtain and rampart constructed of brick in Flemish bond. The whole South entrance was demolished in 1967. (location accurate to the nearest 1m based on available information)