On the north eastern side of the Shoulder of Mutton Battery, close to the fifth gun emplacement within the ditch, there are three shallow brick vaulted casemates, known as the old Piquet House. These were possibly used as temporary accomodation for the guns’ crews set within the adjoining ditch counterscarp wall. The casemates are all interlinked and each is known to have a fireplace on the end wall, though these have now been blocked. Thew date of these is not certain though they are possibly contemporary with the battery dating to 1874. (location accurate to the nearest 1m based on available information)