East Arrow Bastion, which is located between Hudson’s Bastion and East Demi-Bastion on the north eastern side of Dover Castles outer defences was constructed in the 1790’s as part of a major redevelopment of the castle undertaken by Twiss. It is one of four new outworks which were constructed in this area during this period which were designed to provide gunfire towards the fields to the east of the castle. (location accurate to the nearest 1m based on available information)