Built in response to the threat of invasion by Napoleon, Hudson’s bastion was constructed on the eastern side of Dover Castle to improve its defences. It is linked to the castle via Hudson’s Passage. The bastion was designed to provide flanking fire from its numerous firing slits. The caponier projecting from the bastion into the ditch would have provided even more fire power for the defenders.
Visited with Space Invader Obscurity ,Fortknox0
Lots of effort with this ,its not easy to find or get too..