For much of the 19th century, the broad platform behind the terreplein of the North Lines was probably open ground. However, it contains a complex of trenches, many of which are probably associated with First and Second World War activity on the site of the battery. Many are small slit trenches, rectilinear pits, measuring on average 8.0m by 4.0m by 0.6m deep, sometimes with a small upcast bank. Three more are cut into the rampart. (location accurate to the nearest 1m based on available information)